/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-fpi/s2if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:02:55,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:02:55,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:02:55,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:02:55,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:02:55,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:02:55,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:02:55,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:02:55,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:02:55,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:02:55,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:02:55,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:02:55,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:02:55,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:02:55,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:02:55,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:02:55,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:02:55,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:02:55,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:02:55,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:02:55,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:02:55,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:02:55,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:02:55,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:02:55,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:02:55,229 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:02:55,229 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:02:55,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:02:55,230 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:02:55,231 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:02:55,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:02:55,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:02:55,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:02:55,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:02:55,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:02:55,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:02:55,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:02:55,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:02:55,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:02:55,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:02:55,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:02:55,236 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:02:55,259 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:02:55,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:02:55,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:02:55,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:02:55,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:02:55,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:02:55,260 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:02:55,260 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:02:55,260 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:02:55,260 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:02:55,261 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:02:55,261 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:02:55,261 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:02:55,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:02:55,261 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:02:55,261 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:02:55,261 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:02:55,262 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:02:55,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:02:55,262 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:02:55,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:02:55,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:02:55,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:02:55,262 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:02:55,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:02:55,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:02:55,263 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:02:55,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:02:55,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:02:55,264 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:02:55,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:02:55,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:02:55,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:02:55,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:02:55,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:02:55,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:02:55,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:02:55,500 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:02:55,501 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:02:55,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2if.c [2023-03-31 21:02:56,527 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:02:56,680 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:02:56,680 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2if.c [2023-03-31 21:02:56,684 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6948fc0ea/d88824fcb1fb4329978c389be8e95681/FLAG35d6925f4 [2023-03-31 21:02:56,697 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6948fc0ea/d88824fcb1fb4329978c389be8e95681 [2023-03-31 21:02:56,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:02:56,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:02:56,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:02:56,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:02:56,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:02:56,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13412eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56, skipping insertion in model container [2023-03-31 21:02:56,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:02:56,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:02:56,823 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/s2if.c[587,600] [2023-03-31 21:02:56,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:02:56,841 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:02:56,849 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/s2if.c[587,600] [2023-03-31 21:02:56,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:02:56,862 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:02:56,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56 WrapperNode [2023-03-31 21:02:56,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:02:56,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:02:56,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:02:56,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:02:56,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:02:56,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:02:56,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:02:56,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:02:56,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (1/1) ... [2023-03-31 21:02:56,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:02:56,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:02:56,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:02:56,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:02:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:02:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:02:56,943 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:02:56,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 21:02:56,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 21:02:56,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:02:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 21:02:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 21:02:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:02:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:02:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:02:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:02:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:02:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:02:56,997 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:02:56,998 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:02:57,209 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:02:57,256 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:02:57,256 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 21:02:57,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:02:57 BoogieIcfgContainer [2023-03-31 21:02:57,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:02:57,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:02:57,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:02:57,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:02:57,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:02:56" (1/3) ... [2023-03-31 21:02:57,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76082d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:02:57, skipping insertion in model container [2023-03-31 21:02:57,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:02:56" (2/3) ... [2023-03-31 21:02:57,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76082d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:02:57, skipping insertion in model container [2023-03-31 21:02:57,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:02:57" (3/3) ... [2023-03-31 21:02:57,270 INFO L112 eAbstractionObserver]: Analyzing ICFG s2if.c [2023-03-31 21:02:57,284 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:02:57,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:02:57,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:02:57,332 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;@13d33433, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:02:57,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:02:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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) [2023-03-31 21:02:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 21:02:57,341 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:02:57,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:02:57,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:02:57,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:02:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2049730117, now seen corresponding path program 1 times [2023-03-31 21:02:57,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:02:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179000936] [2023-03-31 21:02:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:02:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:02:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:02:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:02:57,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:02:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179000936] [2023-03-31 21:02:57,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179000936] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:02:57,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:02:57,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 21:02:57,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115112462] [2023-03-31 21:02:57,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:02:57,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 21:02:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:02:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 21:02:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 21:02:57,674 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 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 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-03-31 21:02:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:02:57,739 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-03-31 21:02:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 21:02:57,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 16 [2023-03-31 21:02:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:02:57,746 INFO L225 Difference]: With dead ends: 43 [2023-03-31 21:02:57,746 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 21:02:57,748 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 [2023-03-31 21:02:57,750 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:02:57,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:02:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 21:02:57,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 21:02:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-03-31 21:02:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-03-31 21:02:57,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2023-03-31 21:02:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:02:57,774 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-03-31 21:02:57,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-03-31 21:02:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-03-31 21:02:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 21:02:57,774 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:02:57,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:02:57,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:02:57,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:02:57,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:02:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1910355142, now seen corresponding path program 1 times [2023-03-31 21:02:57,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:02:57,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437697103] [2023-03-31 21:02:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:02:57,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:02:57,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:02:57,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098149079] [2023-03-31 21:02:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:02:57,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:02:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:02:57,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:02:57,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:02:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:02:57,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-31 21:02:57,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:02:58,032 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 [2023-03-31 21:02:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:02:58,097 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 [2023-03-31 21:02:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:02:58,215 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 [2023-03-31 21:02:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:02:58,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:02:58,451 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 [2023-03-31 21:02:58,571 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:02:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:02:58,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:02:58,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437697103] [2023-03-31 21:02:58,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:02:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098149079] [2023-03-31 21:02:58,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098149079] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:02:58,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331736459] [2023-03-31 21:02:58,681 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:02:58,681 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:02:58,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:02:58,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:02:58,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:02:58,760 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:02:58,877 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:02:58,901 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:02:58,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:02:58,914 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:02:59,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '246#(and (<= 0 ~N~0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_1| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_1|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_1|))) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:02:59,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:02:59,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:02:59,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-03-31 21:02:59,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342290112] [2023-03-31 21:02:59,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:02:59,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-03-31 21:02:59,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:02:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-03-31 21:02:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2023-03-31 21:02:59,443 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-03-31 21:02:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:02:59,656 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-03-31 21:02:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 21:02:59,657 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 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 18 [2023-03-31 21:02:59,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:02:59,657 INFO L225 Difference]: With dead ends: 27 [2023-03-31 21:02:59,658 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 21:02:59,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=1303, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 21:02:59,659 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:02:59,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:02:59,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 21:02:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-03-31 21:02:59,663 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) [2023-03-31 21:02:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-03-31 21:02:59,663 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2023-03-31 21:02:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:02:59,664 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-03-31 21:02:59,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-03-31 21:02:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-03-31 21:02:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 21:02:59,664 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:02:59,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:02:59,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:02:59,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:02:59,870 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:02:59,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:02:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1034670718, now seen corresponding path program 2 times [2023-03-31 21:02:59,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:02:59,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954350233] [2023-03-31 21:02:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:02:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:02:59,883 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:02:59,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759809846] [2023-03-31 21:02:59,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:02:59,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:02:59,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:02:59,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:02:59,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:02:59,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 21:02:59,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:02:59,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:02:59,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:02:59,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:02:59,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:00,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:00,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954350233] [2023-03-31 21:03:00,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:00,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759809846] [2023-03-31 21:03:00,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759809846] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:00,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950426111] [2023-03-31 21:03:00,003 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:00,003 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:00,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:00,004 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:00,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:00,037 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:00,114 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:00,145 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:00,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:00,154 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:00,529 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '466#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_2|) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_2|) 0))))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:00,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:00,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:00,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-03-31 21:03:00,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706932094] [2023-03-31 21:03:00,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:00,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 21:03:00,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:00,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 21:03:00,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-03-31 21:03:00,531 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2023-03-31 21:03:00,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:00,602 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-03-31 21:03:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:03:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 19 [2023-03-31 21:03:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:00,605 INFO L225 Difference]: With dead ends: 30 [2023-03-31 21:03:00,605 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 21:03:00,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-03-31 21:03:00,606 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:00,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:03:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 21:03:00,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-03-31 21:03:00,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-03-31 21:03:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-03-31 21:03:00,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2023-03-31 21:03:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:00,611 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-03-31 21:03:00,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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) [2023-03-31 21:03:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-03-31 21:03:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 21:03:00,612 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:00,612 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:00,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:00,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 21:03:00,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:00,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2078488509, now seen corresponding path program 3 times [2023-03-31 21:03:00,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:00,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409169899] [2023-03-31 21:03:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:00,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:00,841 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:00,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946261831] [2023-03-31 21:03:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:03:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:00,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:03:00,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:03:00,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:03:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:03:00,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:03:00,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:00,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:00,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:00,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409169899] [2023-03-31 21:03:00,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:00,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946261831] [2023-03-31 21:03:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946261831] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:00,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471370059] [2023-03-31 21:03:00,963 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:00,963 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:00,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:00,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:00,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:00,998 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:01,068 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:01,077 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:01,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:01,085 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:01,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '689#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_3| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_3|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_3|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:01,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:01,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:01,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-03-31 21:03:01,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361641100] [2023-03-31 21:03:01,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:01,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 21:03:01,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 21:03:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-03-31 21:03:01,428 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2023-03-31 21:03:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:01,508 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2023-03-31 21:03:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:03:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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 19 [2023-03-31 21:03:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:01,510 INFO L225 Difference]: With dead ends: 26 [2023-03-31 21:03:01,510 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 21:03:01,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2023-03-31 21:03:01,512 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:01,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:03:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 21:03:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 21:03:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2023-03-31 21:03:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-03-31 21:03:01,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-03-31 21:03:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:01,522 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-03-31 21:03:01,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2023-03-31 21:03:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-03-31 21:03:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 21:03:01,524 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:01,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:01,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:01,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:01,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:01,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -134772315, now seen corresponding path program 4 times [2023-03-31 21:03:01,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:01,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856026976] [2023-03-31 21:03:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:01,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536030548] [2023-03-31 21:03:01,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:03:01,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:01,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:03:01,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 21:03:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:03:01,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-31 21:03:01,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:01,825 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 [2023-03-31 21:03:01,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:01,843 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 [2023-03-31 21:03:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:01,875 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 [2023-03-31 21:03:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:01,945 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 [2023-03-31 21:03:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:01,990 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 [2023-03-31 21:03:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:02,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:02,146 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 [2023-03-31 21:03:02,201 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 [2023-03-31 21:03:02,390 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:03:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:02,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:02,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856026976] [2023-03-31 21:03:02,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:02,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536030548] [2023-03-31 21:03:02,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536030548] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:02,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729028370] [2023-03-31 21:03:02,411 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:02,412 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:02,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:02,412 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:02,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:02,455 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:02,514 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:02,521 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:02,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:02,537 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:03,017 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_4| Int)) (and (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_4|) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_4|) 0))))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:03,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:03,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:03,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-03-31 21:03:03,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57885278] [2023-03-31 21:03:03,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:03,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 21:03:03,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:03,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 21:03:03,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 21:03:03,019 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-03-31 21:03:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:03,957 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-03-31 21:03:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 21:03:03,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-03-31 21:03:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:03,958 INFO L225 Difference]: With dead ends: 32 [2023-03-31 21:03:03,958 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 21:03:03,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2023-03-31 21:03:03,959 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:03,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:03:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 21:03:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-03-31 21:03:03,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-03-31 21:03:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-03-31 21:03:03,966 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2023-03-31 21:03:03,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:03,966 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-03-31 21:03:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-03-31 21:03:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-03-31 21:03:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 21:03:03,967 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:03,967 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:03,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:04,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:04,172 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:04,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash -9112445, now seen corresponding path program 5 times [2023-03-31 21:03:04,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:04,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248121775] [2023-03-31 21:03:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:04,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:04,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:04,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129182711] [2023-03-31 21:03:04,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:03:04,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:04,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:04,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:03:04,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 21:03:04,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 21:03:04,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:03:04,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:03:04,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:04,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:04,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:04,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248121775] [2023-03-31 21:03:04,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:04,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129182711] [2023-03-31 21:03:04,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129182711] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:04,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109069981] [2023-03-31 21:03:04,345 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:04,345 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:04,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:04,346 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:04,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:04,372 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:04,435 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:04,443 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:04,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:04,451 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:04,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1180#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_5| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_5|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:04,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:04,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:04,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-03-31 21:03:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465120562] [2023-03-31 21:03:04,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:04,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 21:03:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:04,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 21:03:04,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-03-31 21:03:04,791 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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) [2023-03-31 21:03:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:04,876 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-03-31 21:03:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 21:03:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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 [2023-03-31 21:03:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:04,877 INFO L225 Difference]: With dead ends: 33 [2023-03-31 21:03:04,877 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 21:03:04,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-03-31 21:03:04,877 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:04,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 53 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:03:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 21:03:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-03-31 21:03:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2023-03-31 21:03:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-03-31 21:03:04,882 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2023-03-31 21:03:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:04,882 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-03-31 21:03:04,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 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) [2023-03-31 21:03:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-03-31 21:03:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 21:03:04,883 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:04,883 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:04,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:05,083 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 [2023-03-31 21:03:05,084 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:05,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:05,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1992274402, now seen corresponding path program 6 times [2023-03-31 21:03:05,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:05,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877449748] [2023-03-31 21:03:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:05,099 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:05,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914671480] [2023-03-31 21:03:05,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:03:05,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:05,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:05,106 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) [2023-03-31 21:03:05,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 21:03:05,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:03:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:03:05,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:03:05,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:05,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:05,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877449748] [2023-03-31 21:03:05,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914671480] [2023-03-31 21:03:05,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914671480] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714355938] [2023-03-31 21:03:05,245 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:05,245 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:05,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:05,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:05,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:05,272 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:05,325 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:05,332 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:05,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:05,338 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:05,684 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1430#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_6| Int)) (and (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_6|) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_6|) 0))))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:05,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:05,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:05,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-03-31 21:03:05,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977165487] [2023-03-31 21:03:05,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:05,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 21:03:05,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:05,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 21:03:05,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-03-31 21:03:05,686 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2023-03-31 21:03:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:05,763 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-03-31 21:03:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 21:03:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 [2023-03-31 21:03:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:05,764 INFO L225 Difference]: With dead ends: 28 [2023-03-31 21:03:05,764 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 21:03:05,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2023-03-31 21:03:05,765 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:05,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:03:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 21:03:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 21:03:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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) [2023-03-31 21:03:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-03-31 21:03:05,769 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2023-03-31 21:03:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:05,769 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-03-31 21:03:05,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2023-03-31 21:03:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-03-31 21:03:05,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 21:03:05,770 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:05,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:05,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 21:03:05,970 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 [2023-03-31 21:03:05,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:05,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:05,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1504826342, now seen corresponding path program 7 times [2023-03-31 21:03:05,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:05,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856299599] [2023-03-31 21:03:05,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:05,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:05,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:05,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749010021] [2023-03-31 21:03:05,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:03:05,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:05,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:05,985 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) [2023-03-31 21:03:05,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 21:03:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:03:06,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 60 conjunts are in the unsatisfiable core [2023-03-31 21:03:06,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:06,084 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 [2023-03-31 21:03:06,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:06,105 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 [2023-03-31 21:03:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:06,126 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 [2023-03-31 21:03:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:06,165 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 [2023-03-31 21:03:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:06,245 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 [2023-03-31 21:03:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:06,302 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 [2023-03-31 21:03:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:06,353 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 [2023-03-31 21:03:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:06,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:06,547 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 [2023-03-31 21:03:06,594 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 [2023-03-31 21:03:06,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:03:06,655 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 [2023-03-31 21:03:06,659 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 [2023-03-31 21:03:07,168 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:03:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:07,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:07,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856299599] [2023-03-31 21:03:07,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:07,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749010021] [2023-03-31 21:03:07,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749010021] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:07,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604720351] [2023-03-31 21:03:07,192 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:07,192 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:07,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:07,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:07,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:07,215 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:07,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:07,272 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:07,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:07,278 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:07,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1692#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_7| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_7|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_7|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:07,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:07,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:07,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-03-31 21:03:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512347624] [2023-03-31 21:03:07,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 21:03:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 21:03:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 21:03:07,859 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-03-31 21:03:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:12,172 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-03-31 21:03:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 21:03:12,172 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-03-31 21:03:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:12,173 INFO L225 Difference]: With dead ends: 35 [2023-03-31 21:03:12,173 INFO L226 Difference]: Without dead ends: 30 [2023-03-31 21:03:12,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2023-03-31 21:03:12,174 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:12,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:03:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-31 21:03:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-03-31 21:03:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2023-03-31 21:03:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-03-31 21:03:12,180 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2023-03-31 21:03:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:12,180 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-03-31 21:03:12,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-03-31 21:03:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-03-31 21:03:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 21:03:12,181 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:12,181 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:12,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:12,390 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 [2023-03-31 21:03:12,391 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:12,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -721161630, now seen corresponding path program 8 times [2023-03-31 21:03:12,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:12,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994465276] [2023-03-31 21:03:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:12,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:12,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:12,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790160116] [2023-03-31 21:03:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:03:12,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:12,424 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) [2023-03-31 21:03:12,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 21:03:12,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 21:03:12,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:03:12,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 21:03:12,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:12,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:12,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:12,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994465276] [2023-03-31 21:03:12,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:12,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790160116] [2023-03-31 21:03:12,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790160116] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:12,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579376541] [2023-03-31 21:03:12,594 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:12,594 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:12,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:12,594 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:12,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:12,622 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:12,677 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:12,685 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:12,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:12,691 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:13,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1972#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_8| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_8|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_8|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:13,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:13,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:13,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-03-31 21:03:13,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191110577] [2023-03-31 21:03:13,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:13,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 21:03:13,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 21:03:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-03-31 21:03:13,060 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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) [2023-03-31 21:03:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:13,172 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-03-31 21:03:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 21:03:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 23 [2023-03-31 21:03:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:13,179 INFO L225 Difference]: With dead ends: 36 [2023-03-31 21:03:13,179 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 21:03:13,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 21:03:13,182 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:13,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:03:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 21:03:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2023-03-31 21:03:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2023-03-31 21:03:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-03-31 21:03:13,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 23 [2023-03-31 21:03:13,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:13,191 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-03-31 21:03:13,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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) [2023-03-31 21:03:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-03-31 21:03:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 21:03:13,192 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:13,192 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:13,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:13,398 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 [2023-03-31 21:03:13,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:13,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1192288483, now seen corresponding path program 9 times [2023-03-31 21:03:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:13,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745058578] [2023-03-31 21:03:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:13,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:13,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031616184] [2023-03-31 21:03:13,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:03:13,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:13,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:13,421 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) [2023-03-31 21:03:13,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 21:03:13,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:03:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:03:13,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 21:03:13,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:13,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:13,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745058578] [2023-03-31 21:03:13,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031616184] [2023-03-31 21:03:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031616184] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [274374026] [2023-03-31 21:03:13,633 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:13,634 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:13,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:13,634 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:13,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:13,666 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:13,738 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:13,744 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:13,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:13,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:14,078 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2249#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_9| Int)) (and (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_9|) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_9|) 0))))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:14,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:14,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:14,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-03-31 21:03:14,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712872039] [2023-03-31 21:03:14,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:14,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 21:03:14,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 21:03:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-03-31 21:03:14,080 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2023-03-31 21:03:14,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:14,170 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-03-31 21:03:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 21:03:14,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 23 [2023-03-31 21:03:14,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:14,170 INFO L225 Difference]: With dead ends: 30 [2023-03-31 21:03:14,170 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 21:03:14,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 21:03:14,171 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:14,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 21:03:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 21:03:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-31 21:03:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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) [2023-03-31 21:03:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-03-31 21:03:14,177 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-03-31 21:03:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:14,177 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-03-31 21:03:14,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2023-03-31 21:03:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-03-31 21:03:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 21:03:14,178 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:14,178 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:14,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:14,383 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 [2023-03-31 21:03:14,384 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:14,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:14,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1819900667, now seen corresponding path program 10 times [2023-03-31 21:03:14,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:14,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023356831] [2023-03-31 21:03:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:14,400 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:14,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335793927] [2023-03-31 21:03:14,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:03:14,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:14,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:14,402 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) [2023-03-31 21:03:14,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 21:03:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:03:14,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 72 conjunts are in the unsatisfiable core [2023-03-31 21:03:14,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:14,506 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 [2023-03-31 21:03:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,528 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 [2023-03-31 21:03:14,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,549 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 [2023-03-31 21:03:14,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,580 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 [2023-03-31 21:03:14,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,615 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 [2023-03-31 21:03:14,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,704 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 [2023-03-31 21:03:14,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,755 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 [2023-03-31 21:03:14,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,800 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 [2023-03-31 21:03:14,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:14,857 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 [2023-03-31 21:03:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:14,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:15,044 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 [2023-03-31 21:03:15,086 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 [2023-03-31 21:03:15,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:03:15,149 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 [2023-03-31 21:03:15,156 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 [2023-03-31 21:03:15,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:03:15,238 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 [2023-03-31 21:03:15,250 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 [2023-03-31 21:03:15,251 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 21:03:16,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:03:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:16,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023356831] [2023-03-31 21:03:16,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335793927] [2023-03-31 21:03:16,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335793927] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667195103] [2023-03-31 21:03:16,684 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:16,684 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:16,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:16,684 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:16,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:16,702 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:16,756 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:16,762 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:16,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:16,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:17,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2537#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_10| Int)) (and (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_10|) (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_10|) 0))))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:17,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:17,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:17,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2023-03-31 21:03:17,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331999970] [2023-03-31 21:03:17,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:17,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-03-31 21:03:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:17,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-03-31 21:03:17,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2023-03-31 21:03:17,502 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2023-03-31 21:03:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:38,842 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-03-31 21:03:38,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 21:03:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-03-31 21:03:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:38,843 INFO L225 Difference]: With dead ends: 38 [2023-03-31 21:03:38,843 INFO L226 Difference]: Without dead ends: 33 [2023-03-31 21:03:38,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=213, Invalid=2337, Unknown=0, NotChecked=0, Total=2550 [2023-03-31 21:03:38,844 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:38,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 21:03:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-31 21:03:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2023-03-31 21:03:38,852 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) [2023-03-31 21:03:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-03-31 21:03:38,852 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2023-03-31 21:03:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:38,853 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-03-31 21:03:38,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2023-03-31 21:03:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-03-31 21:03:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 21:03:38,853 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:38,853 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:38,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:39,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 21:03:39,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:39,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:39,058 INFO L85 PathProgramCache]: Analyzing trace with hash -708483805, now seen corresponding path program 11 times [2023-03-31 21:03:39,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:39,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904604279] [2023-03-31 21:03:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:39,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:39,067 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:39,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480446568] [2023-03-31 21:03:39,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 21:03:39,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:39,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:39,069 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:03:39,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 21:03:39,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 21:03:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:03:39,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 21:03:39,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:39,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:39,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:39,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904604279] [2023-03-31 21:03:39,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:39,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480446568] [2023-03-31 21:03:39,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480446568] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:39,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856545122] [2023-03-31 21:03:39,331 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:39,331 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:39,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:39,331 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:39,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:39,349 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:39,420 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:39,427 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:39,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:39,433 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:39,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2842#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_11| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_11|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_11|))))' at error location [2023-03-31 21:03:39,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:39,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:39,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-03-31 21:03:39,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386280827] [2023-03-31 21:03:39,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:39,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 21:03:39,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 21:03:39,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2023-03-31 21:03:39,812 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2023-03-31 21:03:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:39,940 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-03-31 21:03:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 21:03:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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 25 [2023-03-31 21:03:39,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:39,941 INFO L225 Difference]: With dead ends: 39 [2023-03-31 21:03:39,941 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 21:03:39,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 21:03:39,942 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:39,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:03:39,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 21:03:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-03-31 21:03:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2023-03-31 21:03:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-03-31 21:03:39,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2023-03-31 21:03:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:39,950 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-03-31 21:03:39,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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) [2023-03-31 21:03:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-03-31 21:03:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 21:03:39,950 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:39,950 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:39,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:40,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 21:03:40,156 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:40,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:40,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1521072446, now seen corresponding path program 12 times [2023-03-31 21:03:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:40,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292847293] [2023-03-31 21:03:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:40,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:40,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:40,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864932951] [2023-03-31 21:03:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 21:03:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:40,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:03:40,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 21:03:40,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 21:03:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 21:03:40,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 21:03:40,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:40,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:40,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:40,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292847293] [2023-03-31 21:03:40,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:40,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864932951] [2023-03-31 21:03:40,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864932951] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:40,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447178333] [2023-03-31 21:03:40,438 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:40,438 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:40,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:40,439 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:40,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:40,456 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:40,511 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:40,518 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:40,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:40,531 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:40,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3146#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_12| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_12|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_12|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:40,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:40,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:40,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-03-31 21:03:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130608548] [2023-03-31 21:03:40,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:40,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 21:03:40,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 21:03:40,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-03-31 21:03:40,893 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2023-03-31 21:03:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:03:41,028 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-03-31 21:03:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 21:03:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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 25 [2023-03-31 21:03:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:03:41,028 INFO L225 Difference]: With dead ends: 32 [2023-03-31 21:03:41,028 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 21:03:41,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 21:03:41,029 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:03:41,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 85 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 21:03:41,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 21:03:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 21:03:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2023-03-31 21:03:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-03-31 21:03:41,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2023-03-31 21:03:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:03:41,038 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-03-31 21:03:41,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2023-03-31 21:03:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-03-31 21:03:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 21:03:41,038 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:03:41,039 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:03:41,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 21:03:41,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 21:03:41,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:03:41,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:03:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash -34743546, now seen corresponding path program 13 times [2023-03-31 21:03:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:03:41,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745961692] [2023-03-31 21:03:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:03:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:03:41,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 21:03:41,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704451883] [2023-03-31 21:03:41,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 21:03:41,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:03:41,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:03:41,259 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:03:41,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 21:03:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:03:41,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 84 conjunts are in the unsatisfiable core [2023-03-31 21:03:41,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:03:41,358 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 [2023-03-31 21:03:41,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,388 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 [2023-03-31 21:03:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,429 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 [2023-03-31 21:03:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,472 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 [2023-03-31 21:03:41,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,514 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 [2023-03-31 21:03:41,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 58 [2023-03-31 21:03:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-03-31 21:03:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-03-31 21:03:41,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-03-31 21:03:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-03-31 21:03:41,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 21:03:41,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2023-03-31 21:03:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:42,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:03:42,074 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 [2023-03-31 21:03:42,115 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 [2023-03-31 21:03:42,166 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 [2023-03-31 21:03:42,168 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 21:03:42,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:03:42,263 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 [2023-03-31 21:03:42,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:03:42,270 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 [2023-03-31 21:03:42,275 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 [2023-03-31 21:03:42,424 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 21:03:42,424 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 [2023-03-31 21:03:42,429 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 [2023-03-31 21:03:42,430 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 21:03:42,431 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-03-31 21:03:46,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 21:03:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:03:46,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:03:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745961692] [2023-03-31 21:03:46,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 21:03:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704451883] [2023-03-31 21:03:46,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704451883] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:03:46,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943097218] [2023-03-31 21:03:46,599 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 21:03:46,599 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:03:46,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:03:46,599 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:03:46,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:03:46,615 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-03-31 21:03:46,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 21:03:46,665 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2023-03-31 21:03:46,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 21:03:46,671 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 21:03:47,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3460#(and (<= 0 ~N~0) (<= ~N~0 2147483647) (exists ((|v_main_~#sum~0.base_BEFORE_CALL_13| Int)) (and (not (= (* 2 ~N~0) (select (select |#memory_int| |v_main_~#sum~0.base_BEFORE_CALL_13|) 0))) (<= 0 |v_main_~#sum~0.base_BEFORE_CALL_13|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 21:03:47,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 21:03:47,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 21:03:47,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2023-03-31 21:03:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120716582] [2023-03-31 21:03:47,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 21:03:47,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-03-31 21:03:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:03:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-03-31 21:03:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2084, Unknown=0, NotChecked=0, Total=2256 [2023-03-31 21:03:47,805 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 34 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 21:04:09,885 WARN L223 SmtUtils]: Spent 11.17s on a formula simplification that was a NOOP. DAG size: 213 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)