/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/s22if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:07:43,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:07:43,123 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:07:43,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:07:43,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:07:43,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:07:43,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:07:43,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:07:43,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:07:43,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:07:43,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:07:43,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:07:43,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:07:43,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:07:43,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:07:43,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:07:43,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:07:43,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:07:43,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:07:43,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:07:43,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:07:43,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:07:43,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:07:43,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:07:43,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:07:43,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:07:43,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:07:43,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:07:43,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:07:43,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:07:43,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:07:43,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:07:43,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:07:43,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:07:43,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:07:43,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:07:43,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:07:43,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:07:43,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:07:43,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:07:43,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:07:43,190 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 09:07:43,216 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:07:43,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:07:43,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:07:43,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:07:43,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:07:43,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:07:43,217 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:07:43,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:07:43,218 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:07:43,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:07:43,218 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:07:43,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:07:43,219 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:07:43,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:07:43,219 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:07:43,219 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:07:43,219 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:07:43,219 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:07:43,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:07:43,220 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:07:43,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:07:43,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:07:43,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:07:43,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:07:43,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:07:43,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:07:43,221 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:07:43,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:07:43,221 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:07:43,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:07:43,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:07:43,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:07:43,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:07:43,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:07:43,222 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:07:43,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:07:43,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:07:43,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:07:43,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:07:43,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:07:43,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:07:43,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:07:43,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:07:43,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:07:43,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:07:43,429 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:07:43,429 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:07:43,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s22if.c [2023-04-01 09:07:44,498 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:07:44,619 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:07:44,619 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s22if.c [2023-04-01 09:07:44,626 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c83a441/eec0f0349d4943e7a9ea661b2e15bb64/FLAG6ee8927be [2023-04-01 09:07:44,636 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0c83a441/eec0f0349d4943e7a9ea661b2e15bb64 [2023-04-01 09:07:44,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:07:44,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:07:44,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:07:44,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:07:44,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:07:44,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464ac5a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44, skipping insertion in model container [2023-04-01 09:07:44,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:07:44,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:07:44,769 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/s22if.c[588,601] [2023-04-01 09:07:44,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:07:44,801 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:07:44,811 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/s22if.c[588,601] [2023-04-01 09:07:44,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:07:44,834 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:07:44,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44 WrapperNode [2023-04-01 09:07:44,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:07:44,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:07:44,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:07:44,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:07:44,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,872 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:07:44,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:07:44,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:07:44,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:07:44,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (1/1) ... [2023-04-01 09:07:44,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:07:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:44,897 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 09:07:44,937 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 09:07:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:07:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:07:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:07:44,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:07:44,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:07:44,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:07:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:07:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:07:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:07:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:07:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:07:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:07:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:07:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:07:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:07:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:07:45,028 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:07:45,029 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:07:45,178 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:07:45,240 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:07:45,241 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:07:45,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:07:45 BoogieIcfgContainer [2023-04-01 09:07:45,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:07:45,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:07:45,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:07:45,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:07:45,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:07:44" (1/3) ... [2023-04-01 09:07:45,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37097235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:07:45, skipping insertion in model container [2023-04-01 09:07:45,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:07:44" (2/3) ... [2023-04-01 09:07:45,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37097235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:07:45, skipping insertion in model container [2023-04-01 09:07:45,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:07:45" (3/3) ... [2023-04-01 09:07:45,247 INFO L112 eAbstractionObserver]: Analyzing ICFG s22if.c [2023-04-01 09:07:45,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:07:45,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:07:45,285 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:07:45,289 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;@6a70ffd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:07:45,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:07:45,291 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 09:07:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:07:45,296 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:45,296 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 09:07:45,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:45,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 27340442, now seen corresponding path program 1 times [2023-04-01 09:07:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:45,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350502592] [2023-04-01 09:07:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:45,503 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 09:07:45,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:45,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350502592] [2023-04-01 09:07:45,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350502592] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:07:45,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:07:45,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:07:45,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444357299] [2023-04-01 09:07:45,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:07:45,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:07:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:45,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:07:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:07:45,540 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 09:07:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:45,634 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-04-01 09:07:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:07:45,635 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 09:07:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:45,639 INFO L225 Difference]: With dead ends: 46 [2023-04-01 09:07:45,639 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 09:07:45,641 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 09:07:45,646 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 09:07:45,646 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 09:07:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 09:07:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 09:07:45,672 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 09:07:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 09:07:45,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2023-04-01 09:07:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:45,675 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 09:07:45,675 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 09:07:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 09:07:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 09:07:45,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:45,676 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 09:07:45,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:07:45,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:45,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash 933496895, now seen corresponding path program 1 times [2023-04-01 09:07:45,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660681502] [2023-04-01 09:07:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:45,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:45,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527163032] [2023-04-01 09:07:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:45,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:45,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:45,748 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 09:07:45,761 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 09:07:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:45,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 09:07:45,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:45,907 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 09:07:45,915 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 09:07:45,946 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 09:07:46,024 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 09:07:46,089 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 09:07:46,165 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 09:07:46,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:46,240 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 09:07:46,304 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 09:07:46,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:07:46,476 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 09:07:46,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:46,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660681502] [2023-04-01 09:07:46,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:46,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527163032] [2023-04-01 09:07:46,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527163032] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:46,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713340101] [2023-04-01 09:07:46,507 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:46,507 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:46,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:46,513 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:46,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:46,667 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:48,712 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:07:48,753 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:48,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:48,784 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:50,555 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 (= (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) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1) 50) (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) (= (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)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0) (* 3 ~N~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 09:07:50,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:50,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:50,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-04-01 09:07:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879027850] [2023-04-01 09:07:50,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:07:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:50,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:07:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 09:07:50,561 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 09:07:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:50,863 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-04-01 09:07:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 09:07:50,864 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 09:07:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:50,864 INFO L225 Difference]: With dead ends: 31 [2023-04-01 09:07:50,864 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 09:07:50,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 09:07:50,869 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:50,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 72 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:07:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 09:07:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-04-01 09:07:50,875 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 09:07:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 09:07:50,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-04-01 09:07:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:50,876 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 09:07:50,877 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 09:07:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 09:07:50,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:07:50,877 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:50,877 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 09:07:50,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:07:51,083 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 09:07:51,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:51,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1878810709, now seen corresponding path program 2 times [2023-04-01 09:07:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:51,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160264052] [2023-04-01 09:07:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:51,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:51,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:51,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353622491] [2023-04-01 09:07:51,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:07:51,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:51,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:51,116 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 09:07:51,117 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 09:07:51,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:07:51,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:51,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:07:51,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:51,206 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 09:07:51,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:51,243 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 09:07:51,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160264052] [2023-04-01 09:07:51,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353622491] [2023-04-01 09:07:51,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353622491] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:51,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890479827] [2023-04-01 09:07:51,245 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:51,245 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:51,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:51,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:51,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:51,321 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:52,749 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:07:52,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:52,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:52,803 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:53,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (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) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 1) 50) (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)) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0) (* 3 ~N~0))) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 5)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 2) 2) 50) (= (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))))) (= |__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 09:07:53,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:53,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:53,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:07:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380820812] [2023-04-01 09:07:53,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:07:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:53,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:07:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-04-01 09:07:53,889 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 09:07:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:54,010 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-04-01 09:07:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:07:54,010 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 09:07:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:54,011 INFO L225 Difference]: With dead ends: 35 [2023-04-01 09:07:54,011 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 09:07:54,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:07:54,012 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:54,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 55 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:07:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 09:07:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-04-01 09:07:54,015 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 09:07:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-04-01 09:07:54,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2023-04-01 09:07:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:54,016 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-04-01 09:07:54,016 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 09:07:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-04-01 09:07:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:07:54,017 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:54,017 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 09:07:54,024 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 09:07:54,222 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 09:07:54,222 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:54,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1166617831, now seen corresponding path program 3 times [2023-04-01 09:07:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:54,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775178541] [2023-04-01 09:07:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:54,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:54,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132205963] [2023-04-01 09:07:54,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:07:54,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:54,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:54,241 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 09:07:54,243 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 09:07:54,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:07:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:07:54,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:07:54,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:54,302 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 09:07:54,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:54,322 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 09:07:54,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:54,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775178541] [2023-04-01 09:07:54,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:54,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132205963] [2023-04-01 09:07:54,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132205963] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:54,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581184092] [2023-04-01 09:07:54,326 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:54,326 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:54,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:54,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:54,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:54,376 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:55,684 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:07:55,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:55,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:55,736 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:07:56,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_3| Int) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int))) (and (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 5)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 2) 1) 50) (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 (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0) (* 3 ~N~0))) (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 |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.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:07:56,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:07:56,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:07:56,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 09:07:56,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294559543] [2023-04-01 09:07:56,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:07:56,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 09:07:56,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:07:56,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 09:07:56,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-04-01 09:07:56,970 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 09:07:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:07:57,036 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2023-04-01 09:07:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:07:57,037 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 09:07:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:07:57,038 INFO L225 Difference]: With dead ends: 37 [2023-04-01 09:07:57,038 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 09:07:57,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-04-01 09:07:57,039 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:07:57,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:07:57,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 09:07:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 09:07:57,042 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 09:07:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 09:07:57,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2023-04-01 09:07:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:07:57,043 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 09:07:57,043 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 09:07:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 09:07:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:07:57,043 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:07:57,043 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 09:07:57,053 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 09:07:57,249 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 09:07:57,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:07:57,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:07:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1565570042, now seen corresponding path program 4 times [2023-04-01 09:07:57,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:07:57,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358686310] [2023-04-01 09:07:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:07:57,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:07:57,275 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:07:57,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293799012] [2023-04-01 09:07:57,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:07:57,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:07:57,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:07:57,285 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 09:07:57,294 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 09:07:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:07:57,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-01 09:07:57,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:07:57,357 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 09:07:57,361 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 09:07:57,374 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 09:07:57,391 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 09:07:57,446 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 09:07:57,481 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 09:07:57,542 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 09:07:57,583 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 09:07:57,651 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 09:07:57,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:07:57,718 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 09:07:57,763 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 09:07:57,839 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 09:07:57,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:07:57,908 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 09:07:57,914 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 09:07:57,915 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:57,916 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:07:58,206 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 09:07:58,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:07:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358686310] [2023-04-01 09:07:58,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:07:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293799012] [2023-04-01 09:07:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293799012] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:07:58,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763751467] [2023-04-01 09:07:58,208 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:07:58,208 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:07:58,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:07:58,208 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:07:58,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:07:58,251 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:07:59,603 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:07:59,646 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:07:59,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:07:59,659 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:08:01,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1058#(and (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|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 2) 1) 50) (not (= |v_main_~#sum~0.base_BEFORE_CALL_4| 0)) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= 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 (= (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0))) (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))) (= |__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 09:08:01,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:08:01,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:08:01,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 09:08:01,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032914775] [2023-04-01 09:08:01,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:08:01,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 09:08:01,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 09:08:01,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 09:08:01,079 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 09:08:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:08:01,387 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 09:08:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 09:08:01,391 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 09:08:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:08:01,391 INFO L225 Difference]: With dead ends: 36 [2023-04-01 09:08:01,392 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 09:08:01,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=122, Invalid=1600, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 09:08:01,393 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:08:01,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 120 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:08:01,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 09:08:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 09:08:01,397 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 09:08:01,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-04-01 09:08:01,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2023-04-01 09:08:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:08:01,398 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-04-01 09:08:01,398 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 09:08:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-04-01 09:08:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 09:08:01,399 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:01,399 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 09:08:01,421 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 09:08:01,607 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 09:08:01,607 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:01,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2036782350, now seen corresponding path program 5 times [2023-04-01 09:08:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:01,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209626480] [2023-04-01 09:08:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:01,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:01,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:08:01,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023590730] [2023-04-01 09:08:01,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:08:01,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:08:01,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:08:01,665 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 09:08:01,666 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 09:08:01,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:08:01,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:08:01,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:08:01,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:08:01,898 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 09:08:01,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:08:01,937 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 09:08:01,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:08:01,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209626480] [2023-04-01 09:08:01,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:08:01,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023590730] [2023-04-01 09:08:01,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023590730] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:08:01,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400202081] [2023-04-01 09:08:01,940 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:08:01,940 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:08:01,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:08:01,940 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:08:01,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:08:01,982 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:08:03,233 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:08:03,274 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:08:03,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:08:03,285 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:08:04,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1342#(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) (= 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 (= (* 3 ~N~0) (select (select |#memory_int| |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) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 7) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 2) 50) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 2) 1) 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 09:08:04,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:08:04,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:08:04,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 09:08:04,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808662073] [2023-04-01 09:08:04,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:08:04,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:08:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:08:04,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:08:04,518 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 09:08:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:08:04,637 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-04-01 09:08:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:08:04,637 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 09:08:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:08:04,638 INFO L225 Difference]: With dead ends: 41 [2023-04-01 09:08:04,638 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 09:08:04,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-04-01 09:08:04,639 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:08:04,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:08:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 09:08:04,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-04-01 09:08:04,643 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 09:08:04,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-04-01 09:08:04,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2023-04-01 09:08:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:08:04,644 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-04-01 09:08:04,644 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 09:08:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-04-01 09:08:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 09:08:04,645 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:04,645 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 09:08:04,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 09:08:04,850 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 09:08:04,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:04,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:04,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1247780542, now seen corresponding path program 6 times [2023-04-01 09:08:04,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:04,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452565740] [2023-04-01 09:08:04,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:04,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:04,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:08:04,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675375919] [2023-04-01 09:08:04,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:08:04,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:08:04,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:08:04,878 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 09:08:04,879 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 09:08:04,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:08:04,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:08:04,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:08:04,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:08:04,969 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 09:08:04,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:08:05,005 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 09:08:05,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:08:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452565740] [2023-04-01 09:08:05,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:08:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675375919] [2023-04-01 09:08:05,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675375919] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:08:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479741869] [2023-04-01 09:08:05,006 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:08:05,006 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:08:05,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:08:05,007 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:08:05,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:08:05,047 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:08:06,278 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:08:06,320 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:08:06,328 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:08:06,332 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:08:07,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1635#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (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)) (= 50 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 1)) (= (select |v_old(#valid)_BEFORE_CALL_23| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 1) 0) (= 8 (select |v_old(#length)_BEFORE_CALL_23| 2)) (not (= |v_main_~#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))) (not (= (* 3 ~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) 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) (= (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))) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:08:07,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:08:07,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:08:07,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 09:08:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490609940] [2023-04-01 09:08:07,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:08:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:08:07,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:08:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-04-01 09:08:07,611 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 09:08:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:08:07,694 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-04-01 09:08:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 09:08:07,696 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 09:08:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:08:07,697 INFO L225 Difference]: With dead ends: 43 [2023-04-01 09:08:07,697 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 09:08:07,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:08:07,698 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:08:07,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:08:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 09:08:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 09:08:07,702 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 09:08:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 09:08:07,703 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-04-01 09:08:07,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:08:07,703 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 09:08:07,703 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 09:08:07,703 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 09:08:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 09:08:07,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:07,703 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 09:08:07,710 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 09:08:07,910 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 09:08:07,910 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:07,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:07,911 INFO L85 PathProgramCache]: Analyzing trace with hash -247409057, now seen corresponding path program 7 times [2023-04-01 09:08:07,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:07,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297341604] [2023-04-01 09:08:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:07,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:07,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:08:07,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453900924] [2023-04-01 09:08:07,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:08:07,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:08:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:08:07,930 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 09:08:07,932 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 09:08:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:08:07,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 77 conjunts are in the unsatisfiable core [2023-04-01 09:08:08,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:08:08,006 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 09:08:08,009 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 09:08:08,021 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 09:08:08,038 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 09:08:08,057 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 09:08:08,118 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 09:08:08,154 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 09:08:08,192 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 09:08:08,265 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 09:08:08,305 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 09:08:08,348 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 09:08:08,428 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 09:08:08,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:08:08,506 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 09:08:08,549 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 09:08:08,605 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 09:08:08,607 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:08,745 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 09:08:08,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:08,841 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 09:08:08,847 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 09:08:08,848 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:08,849 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:08,850 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:08,990 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 09:08:08,995 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 09:08:08,996 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:08,997 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:08,998 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:08,999 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:09,906 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 09:08:09,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:08:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297341604] [2023-04-01 09:08:09,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:08:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453900924] [2023-04-01 09:08:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453900924] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:08:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183800146] [2023-04-01 09:08:09,908 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:08:09,908 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:08:09,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:08:09,908 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:08:09,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:08:09,950 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:08:11,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:08:11,282 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:08:11,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:08:11,293 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:08:13,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1963#(and (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 (= |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 (= (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_7|) 0))) (not (= |v_main_~#sum~0.base_BEFORE_CALL_7| 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 (select |v_old(#memory_int)_BEFORE_CALL_27| 2) 1) 50) (= (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))))) (= |__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 09:08:13,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:08:13,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:08:13,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2023-04-01 09:08:13,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339127966] [2023-04-01 09:08:13,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:08:13,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 09:08:13,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 09:08:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1943, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 09:08:13,254 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 32 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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 09:08:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:08:14,095 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-04-01 09:08:14,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 09:08:14,095 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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 26 [2023-04-01 09:08:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:08:14,098 INFO L225 Difference]: With dead ends: 41 [2023-04-01 09:08:14,098 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 09:08:14,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 09:08:14,100 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:08:14,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 208 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:08:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 09:08:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-04-01 09:08:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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 09:08:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 09:08:14,115 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2023-04-01 09:08:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:08:14,115 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 09:08:14,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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 09:08:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 09:08:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 09:08:14,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:14,118 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:08:14,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 09:08:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:08:14,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:14,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:14,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1685335243, now seen corresponding path program 8 times [2023-04-01 09:08:14,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:14,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39360121] [2023-04-01 09:08:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:14,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:14,361 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:08:14,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973453318] [2023-04-01 09:08:14,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:08:14,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:08:14,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:08:14,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:08:14,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 09:08:14,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:08:14,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:08:14,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:08:14,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:08:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:08:14,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:08:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:08:14,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:08:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39360121] [2023-04-01 09:08:14,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:08:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973453318] [2023-04-01 09:08:14,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973453318] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:08:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [464774922] [2023-04-01 09:08:14,602 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:08:14,602 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:08:14,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:08:14,602 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:08:14,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:08:14,642 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:08:15,863 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:08:15,899 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:08:15,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:08:15,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:08:17,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2286#(and (exists ((|v_old(#valid)_BEFORE_CALL_31| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_8| Int) (|v_old(#length)_BEFORE_CALL_31| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_31| (Array Int (Array Int Int)))) (and (not (= |v_old(#length)_BEFORE_CALL_31| (select |v_old(#memory_int)_BEFORE_CALL_31| 2))) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (= (select |v_old(#valid)_BEFORE_CALL_31| 0) 0) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_8|) 0) (* 3 ~N~0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 0) 115) (= (select |v_old(#length)_BEFORE_CALL_31| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_31| (select |v_old(#memory_int)_BEFORE_CALL_31| 2))) (not (= |v_old(#valid)_BEFORE_CALL_31| (select |v_old(#memory_int)_BEFORE_CALL_31| 1))) (= (select |v_old(#length)_BEFORE_CALL_31| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_31| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 7) 0) (not (= |v_main_~#sum~0.base_BEFORE_CALL_8| 0)) (= (select |v_old(#length)_BEFORE_CALL_31| 2) 8) (= (select |v_old(#valid)_BEFORE_CALL_31| 3) 1) (not (= |v_main_~#sum~0.base_BEFORE_CALL_8| 1)) (not (= |v_old(#valid)_BEFORE_CALL_31| |v_old(#length)_BEFORE_CALL_31|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 3) 105) (= 102 (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 4)) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_8|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 2) 50) (not (= (select |v_old(#memory_int)_BEFORE_CALL_31| 1) |v_old(#length)_BEFORE_CALL_31|)) (= (select |v_old(#valid)_BEFORE_CALL_31| |v_main_~#sum~0.base_BEFORE_CALL_8|) 0) (not (= |v_main_~#sum~0.base_BEFORE_CALL_8| |#StackHeapBarrier|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_31| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_31| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 5) 46) (not (= (select |v_old(#memory_int)_BEFORE_CALL_31| 1) (select |v_old(#memory_int)_BEFORE_CALL_31| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_31| 2) 1) 50))) (= |__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 09:08:17,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:08:17,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:08:17,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-01 09:08:17,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835797045] [2023-04-01 09:08:17,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:08:17,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 09:08:17,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 09:08:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:08:17,075 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 09:08:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:08:17,228 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-04-01 09:08:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:08:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 27 [2023-04-01 09:08:17,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:08:17,236 INFO L225 Difference]: With dead ends: 47 [2023-04-01 09:08:17,236 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 09:08:17,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 09:08:17,237 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:08:17,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:08:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 09:08:17,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2023-04-01 09:08:17,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 09:08:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 09:08:17,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2023-04-01 09:08:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:08:17,243 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 09:08:17,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 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 09:08:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 09:08:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 09:08:17,244 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:17,244 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:08:17,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 09:08:17,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 09:08:17,449 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:17,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 880003321, now seen corresponding path program 9 times [2023-04-01 09:08:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:17,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091374756] [2023-04-01 09:08:17,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:17,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:08:17,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405879556] [2023-04-01 09:08:17,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:08:17,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:08:17,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:08:17,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:08:17,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 09:08:17,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:08:17,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:08:17,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:08:17,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:08:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:08:17,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:08:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:08:17,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:08:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091374756] [2023-04-01 09:08:17,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:08:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405879556] [2023-04-01 09:08:17,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405879556] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:08:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437196626] [2023-04-01 09:08:17,651 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:08:17,652 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:08:17,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:08:17,652 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:08:17,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:08:17,728 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:08:19,093 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:08:19,129 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:08:19,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:08:19,140 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:08:20,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2620#(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_35| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_35| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_35| (Array Int Int)) (|v_main_~#sum~0.base_BEFORE_CALL_9| Int)) (and (not (= |v_old(#length)_BEFORE_CALL_35| (select |v_old(#memory_int)_BEFORE_CALL_35| 1))) (not (= |v_main_~#sum~0.base_BEFORE_CALL_9| 1)) (not (= |v_main_~#sum~0.base_BEFORE_CALL_9| |#StackHeapBarrier|)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 5)) (= (select |v_old(#valid)_BEFORE_CALL_35| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_35| 2) (select |v_old(#memory_int)_BEFORE_CALL_35| 1))) (not (= |v_main_~#sum~0.base_BEFORE_CALL_9| 0)) (= (select |v_old(#length)_BEFORE_CALL_35| 3) 12) (not (= |v_old(#valid)_BEFORE_CALL_35| |v_old(#length)_BEFORE_CALL_35|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_35| 1) 0)) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_9|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 3) 105) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_9|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 6) 99) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 7) 0) (= 8 (select |v_old(#length)_BEFORE_CALL_35| 2)) (= 1 (select |v_old(#valid)_BEFORE_CALL_35| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 1) 50) (= (select |v_old(#valid)_BEFORE_CALL_35| |v_main_~#sum~0.base_BEFORE_CALL_9|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 4) 102) (not (= (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_9|) 0) (* 3 ~N~0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_35| 2) |v_old(#length)_BEFORE_CALL_35|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 2) 50) (= (select |v_old(#valid)_BEFORE_CALL_35| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_35| 3) 1) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_35| 2) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_35| 2) |v_old(#valid)_BEFORE_CALL_35|)) (= 2 (select |v_old(#length)_BEFORE_CALL_35| 1)) (not (= |v_old(#valid)_BEFORE_CALL_35| (select |v_old(#memory_int)_BEFORE_CALL_35| 1))))) (= |#NULL.base| 0))' at error location [2023-04-01 09:08:20,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:08:20,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:08:20,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 09:08:20,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422027964] [2023-04-01 09:08:20,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:08:20,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 09:08:20,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:20,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 09:08:20,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:08:20,470 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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 09:08:20,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:08:20,611 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-04-01 09:08:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 09:08:20,612 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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 27 [2023-04-01 09:08:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:08:20,612 INFO L225 Difference]: With dead ends: 49 [2023-04-01 09:08:20,612 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 09:08:20,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2023-04-01 09:08:20,613 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:08:20,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:08:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 09:08:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 09:08:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 09:08:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 09:08:20,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2023-04-01 09:08:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:08:20,619 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 09:08:20,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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 09:08:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 09:08:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 09:08:20,620 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:08:20,620 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:08:20,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 09:08:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 09:08:20,827 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:08:20,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:08:20,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1469468326, now seen corresponding path program 10 times [2023-04-01 09:08:20,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:08:20,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073670889] [2023-04-01 09:08:20,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:08:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:08:20,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:08:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108746969] [2023-04-01 09:08:20,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:08:20,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:08:20,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:08:20,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:08:20,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 09:08:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:08:20,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 102 conjunts are in the unsatisfiable core [2023-04-01 09:08:20,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:08:20,943 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 09:08:20,952 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 09:08:20,970 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 09:08:20,994 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 09:08:21,023 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 09:08:21,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 09:08:21,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 51 [2023-04-01 09:08:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:08:21,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:08:21,681 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 09:08:21,724 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 09:08:21,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:21,769 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 09:08:21,772 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 09:08:21,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:21,834 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 09:08:21,838 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 09:08:21,840 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,027 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 09:08:22,259 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 18 treesize of output 16 [2023-04-01 09:08:22,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:22,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2023-04-01 09:08:22,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:22,276 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 41 treesize of output 39 [2023-04-01 09:08:22,283 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 09:08:22,284 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,285 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:22,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 55 [2023-04-01 09:08:22,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:22,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 55 [2023-04-01 09:08:22,516 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 09:08:22,517 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,518 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,519 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,520 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,844 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 44 treesize of output 42 [2023-04-01 09:08:22,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:08:22,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 66 [2023-04-01 09:08:22,871 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 09:08:22,873 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,874 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,875 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,876 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:22,877 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 09:08:26,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:08:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:08:26,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:08:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073670889] [2023-04-01 09:08:26,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:08:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108746969] [2023-04-01 09:08:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108746969] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:08:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883063681] [2023-04-01 09:08:26,787 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:08:26,787 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:08:26,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:08:26,788 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:08:26,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:08:26,840 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 86 for LOIs [2023-04-01 09:08:28,091 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 106 for LOIs [2023-04-01 09:08:28,127 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 91 for LOIs [2023-04-01 09:08:28,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:08:28,137 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:08:30,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2994#(and (exists ((|v_main_~#sum~0.base_BEFORE_CALL_10| Int) (|v_old(#memory_int)_BEFORE_CALL_39| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_39| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_39| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_39| 1) 1) (not (= |v_main_~#sum~0.base_BEFORE_CALL_10| 1)) (= (select |v_old(#valid)_BEFORE_CALL_39| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 3) 105) (not (= 3 |v_main_~#sum~0.base_BEFORE_CALL_10|)) (not (= |#StackHeapBarrier| |v_main_~#sum~0.base_BEFORE_CALL_10|)) (= (select |v_old(#length)_BEFORE_CALL_39| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_39| |v_old(#length)_BEFORE_CALL_39|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 2) 50) (not (= |v_main_~#sum~0.base_BEFORE_CALL_10| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 4) 102) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 1) 50) (not (= 2 |v_main_~#sum~0.base_BEFORE_CALL_10|)) (= (select |v_old(#valid)_BEFORE_CALL_39| |v_main_~#sum~0.base_BEFORE_CALL_10|) 0) (= (select |v_old(#valid)_BEFORE_CALL_39| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_39| 1) |v_old(#valid)_BEFORE_CALL_39|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_39| 1) (select |v_old(#memory_int)_BEFORE_CALL_39| 2))) (= 8 (select |v_old(#length)_BEFORE_CALL_39| 2)) (not (= |v_old(#valid)_BEFORE_CALL_39| (select |v_old(#memory_int)_BEFORE_CALL_39| 2))) (= 115 (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 0)) (= (select |v_old(#valid)_BEFORE_CALL_39| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 7) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_39| 1) |v_old(#length)_BEFORE_CALL_39|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 6) 99) (= (select |v_old(#length)_BEFORE_CALL_39| 3) 12) (not (= (* 3 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_10|) 0))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 1) 0) 48) (not (= |v_old(#length)_BEFORE_CALL_39| (select |v_old(#memory_int)_BEFORE_CALL_39| 2))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_39| 2) 5) 46))) (= |__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 09:08:30,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:08:30,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:08:30,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 40 [2023-04-01 09:08:30,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939812618] [2023-04-01 09:08:30,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:08:30,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 09:08:30,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:08:30,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 09:08:30,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2664, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 09:08:30,473 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:08:53,721 WARN L223 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)