/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-patterns/array4_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:00:43,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:00:43,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:00:43,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:00:43,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:00:43,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:00:43,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:00:43,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:00:43,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:00:43,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:00:43,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:00:43,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:00:43,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:00:43,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:00:43,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:00:43,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:00:43,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:00:43,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:00:43,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:00:43,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:00:43,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:00:43,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:00:43,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:00:43,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:00:43,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:00:43,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:00:43,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:00:43,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:00:43,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:00:43,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:00:43,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:00:43,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:00:43,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:00:43,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:00:43,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:00:43,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:00:43,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:00:43,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:00:43,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:00:43,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:00:43,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:00:43,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:00:43,248 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:00:43,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:00:43,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:00:43,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:00:43,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:00:43,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:00:43,250 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:00:43,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:00:43,250 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:00:43,250 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:00:43,251 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:00:43,251 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:00:43,251 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:00:43,251 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:00:43,251 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:00:43,252 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:00:43,252 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:00:43,252 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:00:43,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:00:43,253 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:00:43,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:00:43,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:00:43,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:00:43,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:00:43,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:00:43,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:00:43,254 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:00:43,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:00:43,254 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:00:43,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:00:43,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:00:43,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:00:43,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:00:43,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:00:43,255 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:00:43,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:00:43,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:00:43,255 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:00:43,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:00:43,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:00:43,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:00:43,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:00:43,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:00:43,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:00:43,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:00:43,515 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:00:43,515 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:00:43,517 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2023-04-01 09:00:44,732 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:00:44,887 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:00:44,887 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2023-04-01 09:00:44,894 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439487181/e145975dbee9496281191de023536125/FLAGc46853279 [2023-04-01 09:00:44,905 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439487181/e145975dbee9496281191de023536125 [2023-04-01 09:00:44,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:00:44,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:00:44,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:00:44,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:00:44,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:00:44,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:00:44" (1/1) ... [2023-04-01 09:00:44,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd18bad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:44, skipping insertion in model container [2023-04-01 09:00:44,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:00:44" (1/1) ... [2023-04-01 09:00:44,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:00:44,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:00:45,065 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-patterns/array4_pattern.c[1835,1848] [2023-04-01 09:00:45,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:00:45,105 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:00:45,117 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-patterns/array4_pattern.c[1835,1848] [2023-04-01 09:00:45,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:00:45,156 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:00:45,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45 WrapperNode [2023-04-01 09:00:45,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:00:45,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:00:45,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:00:45,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:00:45,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,204 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:00:45,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:00:45,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:00:45,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:00:45,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (1/1) ... [2023-04-01 09:00:45,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:00:45,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:00:45,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:00:45,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:00:45,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:00:45,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:00:45,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:00:45,281 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:00:45,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:00:45,281 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:00:45,281 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 09:00:45,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:00:45,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:00:45,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:00:45,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:00:45,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:00:45,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:00:45,379 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:00:45,380 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:00:45,577 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:00:45,616 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:00:45,616 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:00:45,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:00:45 BoogieIcfgContainer [2023-04-01 09:00:45,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:00:45,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:00:45,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:00:45,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:00:45,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:00:44" (1/3) ... [2023-04-01 09:00:45,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4885b4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:00:45, skipping insertion in model container [2023-04-01 09:00:45,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:00:45" (2/3) ... [2023-04-01 09:00:45,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4885b4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:00:45, skipping insertion in model container [2023-04-01 09:00:45,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:00:45" (3/3) ... [2023-04-01 09:00:45,631 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2023-04-01 09:00:45,668 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:00:45,668 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:00:45,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:00:45,727 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;@17296748, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:00:45,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:00:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 09:00:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:00:45,737 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:00:45,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:00:45,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:00:45,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:00:45,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1503398764, now seen corresponding path program 1 times [2023-04-01 09:00:45,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:00:45,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634128104] [2023-04-01 09:00:45,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:45,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:00:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:00:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:00:45,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:00:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634128104] [2023-04-01 09:00:45,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634128104] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:00:45,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:00:45,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 09:00:45,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524488203] [2023-04-01 09:00:45,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:00:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 09:00:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:00:45,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 09:00:45,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 09:00:45,999 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:00:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:00:46,065 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2023-04-01 09:00:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 09:00:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2023-04-01 09:00:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:00:46,075 INFO L225 Difference]: With dead ends: 45 [2023-04-01 09:00:46,075 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 09:00:46,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 09:00:46,085 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:00:46,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 09:00:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 09:00:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 09:00:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:00:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-04-01 09:00:46,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2023-04-01 09:00:46,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:00:46,120 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-04-01 09:00:46,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:00:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-04-01 09:00:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 09:00:46,124 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:00:46,124 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:00:46,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:00:46,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:00:46,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:00:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1007309007, now seen corresponding path program 1 times [2023-04-01 09:00:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:00:46,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597848715] [2023-04-01 09:00:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:46,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:00:46,187 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:00:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971797615] [2023-04-01 09:00:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:46,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:00:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:00:46,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:00:46,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:00:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:00:46,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:00:46,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:00:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:00:46,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:00:46,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:00:46,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597848715] [2023-04-01 09:00:46,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:00:46,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971797615] [2023-04-01 09:00:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971797615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:00:46,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:00:46,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:00:46,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461436223] [2023-04-01 09:00:46,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:00:46,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:00:46,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:00:46,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:00:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:00:46,433 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 09:00:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:00:46,501 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-04-01 09:00:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 09:00:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2023-04-01 09:00:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:00:46,503 INFO L225 Difference]: With dead ends: 32 [2023-04-01 09:00:46,503 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 09:00:46,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:00:46,505 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:00:46,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:00:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 09:00:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 09:00:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:00:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-04-01 09:00:46,512 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 33 [2023-04-01 09:00:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:00:46,512 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-04-01 09:00:46,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 09:00:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-04-01 09:00:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 09:00:46,513 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:00:46,513 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:00:46,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:00:46,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:00:46,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:00:46,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:00:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1086702174, now seen corresponding path program 1 times [2023-04-01 09:00:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:00:46,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003356277] [2023-04-01 09:00:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:00:46,741 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:00:46,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157077214] [2023-04-01 09:00:46,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:46,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:00:46,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:00:46,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:00:46,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:00:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:00:46,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:00:46,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:00:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:00:46,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:00:46,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:00:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003356277] [2023-04-01 09:00:46,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:00:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157077214] [2023-04-01 09:00:46,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157077214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:00:46,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:00:46,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:00:46,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305378279] [2023-04-01 09:00:46,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:00:46,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:00:46,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:00:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:00:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:00:46,933 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 09:00:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:00:47,014 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-04-01 09:00:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:00:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 34 [2023-04-01 09:00:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:00:47,017 INFO L225 Difference]: With dead ends: 47 [2023-04-01 09:00:47,017 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 09:00:47,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-04-01 09:00:47,018 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:00:47,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 61 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:00:47,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 09:00:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 09:00:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:00:47,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-04-01 09:00:47,024 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 34 [2023-04-01 09:00:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:00:47,025 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-04-01 09:00:47,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 09:00:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-04-01 09:00:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 09:00:47,026 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:00:47,026 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:00:47,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 09:00:47,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 09:00:47,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:00:47,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:00:47,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1097485325, now seen corresponding path program 1 times [2023-04-01 09:00:47,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:00:47,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440921446] [2023-04-01 09:00:47,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:47,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:00:47,269 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:00:47,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118946034] [2023-04-01 09:00:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:47,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:00:47,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:00:47,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:00:47,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:00:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:00:47,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 53 conjunts are in the unsatisfiable core [2023-04-01 09:00:47,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:00:47,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:00:47,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:00:47,938 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2023-04-01 09:00:47,949 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 24 treesize of output 24 [2023-04-01 09:00:47,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 11 [2023-04-01 09:00:47,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-04-01 09:00:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:00:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 09:00:48,163 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-04-01 09:00:48,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2023-04-01 09:00:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:00:48,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:00:48,325 INFO L321 Elim1Store]: treesize reduction 20, result has 64.3 percent of original size [2023-04-01 09:00:48,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 111 [2023-04-01 09:00:48,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:00:48,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 155 [2023-04-01 09:00:48,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:00:48,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2023-04-01 09:00:48,460 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:00:48,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 85 [2023-04-01 09:00:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 09:00:49,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:00:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440921446] [2023-04-01 09:00:49,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:00:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118946034] [2023-04-01 09:00:49,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118946034] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:00:49,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35274828] [2023-04-01 09:00:49,574 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:00:49,576 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:00:49,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:00:49,588 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:00:49,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:00:49,751 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:00:51,439 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:00:51,479 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:00:51,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:00:51,486 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:00:54,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_main_~#array1~0.base_BEFORE_CALL_17| Int) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int))) (and (= 17 (select |v_old(#length)_BEFORE_CALL_11| 2)) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= |v_main_~#array1~0.base_BEFORE_CALL_17| 1)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_17| |#StackHeapBarrier|)) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_17| 3)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= |v_main_~#array1~0.base_BEFORE_CALL_17| 2)) (= (select |v_old(#valid)_BEFORE_CALL_11| |v_main_~#array1~0.base_BEFORE_CALL_17|) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_17| 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0))) (not (= ~ARR_SIZE~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:00:54,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:00:54,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:00:54,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2023-04-01 09:00:54,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954428581] [2023-04-01 09:00:54,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:00:54,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 09:00:54,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:00:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 09:00:54,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2316, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 09:00:54,749 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 09:00:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:00:57,559 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2023-04-01 09:00:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 09:00:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 35 [2023-04-01 09:00:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:00:57,561 INFO L225 Difference]: With dead ends: 88 [2023-04-01 09:00:57,561 INFO L226 Difference]: Without dead ends: 82 [2023-04-01 09:00:57,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=572, Invalid=4830, Unknown=0, NotChecked=0, Total=5402 [2023-04-01 09:00:57,565 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 133 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:00:57,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 280 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:00:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-01 09:00:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 44. [2023-04-01 09:00:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 09:00:57,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-04-01 09:00:57,589 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 35 [2023-04-01 09:00:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:00:57,590 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-04-01 09:00:57,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2023-04-01 09:00:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-04-01 09:00:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 09:00:57,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:00:57,592 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:00:57,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:00:57,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:00:57,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:00:57,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:00:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash -412799264, now seen corresponding path program 2 times [2023-04-01 09:00:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:00:57,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597212009] [2023-04-01 09:00:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:00:57,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:00:57,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:00:57,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710846079] [2023-04-01 09:00:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:00:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:00:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:00:57,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:00:57,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:00:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 09:00:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:00:57,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:00:57,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:00:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:00:57,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:00:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:00:58,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:00:58,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597212009] [2023-04-01 09:00:58,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:00:58,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710846079] [2023-04-01 09:00:58,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710846079] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:00:58,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727888469] [2023-04-01 09:00:58,022 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:00:58,022 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:00:58,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:00:58,023 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:00:58,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:00:58,062 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:00:59,152 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:00:59,178 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:00:59,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:00:59,183 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:01,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1299#(and (not (= ~ARR_SIZE~0 0)) (exists ((|v_old(#length)_BEFORE_CALL_27| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_27| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_27| (Array Int Int)) (|v_main_~#array1~0.base_BEFORE_CALL_30| Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_27| (select |v_old(#memory_int)_BEFORE_CALL_27| 1))) (not (= |v_old(#valid)_BEFORE_CALL_27| |v_old(#length)_BEFORE_CALL_27|)) (= (select |v_old(#length)_BEFORE_CALL_27| 1) 2) (not (= |v_main_~#array1~0.base_BEFORE_CALL_30| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_27| 1) |v_old(#length)_BEFORE_CALL_27|)) (= (select |v_old(#valid)_BEFORE_CALL_27| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_27| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (not (= |v_main_~#array1~0.base_BEFORE_CALL_30| 0)) (= (select |v_old(#valid)_BEFORE_CALL_27| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_27| |v_main_~#array1~0.base_BEFORE_CALL_30|) 0) (not (= |v_main_~#array1~0.base_BEFORE_CALL_30| |#StackHeapBarrier|)) (= (select |v_old(#length)_BEFORE_CALL_27| 2) 17) (not (= |v_main_~#array1~0.base_BEFORE_CALL_30| 2)) (= 12 (select |v_old(#length)_BEFORE_CALL_27| 3)) (= (select |v_old(#valid)_BEFORE_CALL_27| 3) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_30| 3)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:01,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:01,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:01:01,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:01:01,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831672035] [2023-04-01 09:01:01,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:01,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:01:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:01:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 09:01:01,311 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:01,556 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2023-04-01 09:01:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:01:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 36 [2023-04-01 09:01:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:01,558 INFO L225 Difference]: With dead ends: 73 [2023-04-01 09:01:01,558 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 09:01:01,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:01:01,559 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:01,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 85 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:01:01,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 09:01:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2023-04-01 09:01:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:01:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-04-01 09:01:01,574 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 36 [2023-04-01 09:01:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:01,574 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-04-01 09:01:01,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-04-01 09:01:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 09:01:01,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:01,575 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:01,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 09:01:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:01,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:01,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1431763006, now seen corresponding path program 3 times [2023-04-01 09:01:01,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:01,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390418690] [2023-04-01 09:01:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:01,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:01,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:01,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506045966] [2023-04-01 09:01:01,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:01:01,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:01,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:01,801 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:01:01,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 09:01:01,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:01:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:01:01,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:01:01,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:01:01,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:01:01,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:01,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390418690] [2023-04-01 09:01:01,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506045966] [2023-04-01 09:01:01,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506045966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:01,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [45969318] [2023-04-01 09:01:01,971 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:01,972 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:01,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:01,972 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:01,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:02,005 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:02,896 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:02,921 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:02,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:02,926 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:05,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1717#(and (not (= ~ARR_SIZE~0 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_43| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_43| (Array Int Int)) (|v_main_~#array1~0.base_BEFORE_CALL_43| Int) (|v_old(#length)_BEFORE_CALL_43| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_43| 3) 12) (not (= |v_main_~#array1~0.base_BEFORE_CALL_43| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 1) 0) 48) (not (= |v_main_~#array1~0.base_BEFORE_CALL_43| 3)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_43| 1) |v_old(#length)_BEFORE_CALL_43|)) (not (= |v_old(#valid)_BEFORE_CALL_43| |v_old(#length)_BEFORE_CALL_43|)) (= (select |v_old(#valid)_BEFORE_CALL_43| 0) 0) (not (= |v_main_~#array1~0.base_BEFORE_CALL_43| |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_43| (select |v_old(#memory_int)_BEFORE_CALL_43| 1))) (= (select |v_old(#valid)_BEFORE_CALL_43| 3) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_43| 1)) (= 17 (select |v_old(#length)_BEFORE_CALL_43| 2)) (= 2 (select |v_old(#length)_BEFORE_CALL_43| 1)) (= (select |v_old(#valid)_BEFORE_CALL_43| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_43| |v_main_~#array1~0.base_BEFORE_CALL_43|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_43| 1) 1) 0) (not (= |v_main_~#array1~0.base_BEFORE_CALL_43| 2)) (= (select |v_old(#valid)_BEFORE_CALL_43| 1) 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:05,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:05,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:01:05,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 09:01:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375068467] [2023-04-01 09:01:05,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:05,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 09:01:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 09:01:05,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 09:01:05,019 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:05,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:05,163 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-04-01 09:01:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:01:05,166 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 36 [2023-04-01 09:01:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:05,167 INFO L225 Difference]: With dead ends: 45 [2023-04-01 09:01:05,167 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 09:01:05,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:01:05,170 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:05,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 79 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:01:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 09:01:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-04-01 09:01:05,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:01:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-04-01 09:01:05,186 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 36 [2023-04-01 09:01:05,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:05,186 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-04-01 09:01:05,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:05,186 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-04-01 09:01:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 09:01:05,193 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:05,193 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:05,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 09:01:05,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:05,400 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:05,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:05,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1359874255, now seen corresponding path program 4 times [2023-04-01 09:01:05,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:05,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924492584] [2023-04-01 09:01:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:05,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:05,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:05,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656246781] [2023-04-01 09:01:05,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:01:05,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:05,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:05,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:01:05,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 09:01:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:05,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-01 09:01:05,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:05,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:01:05,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:01:05,573 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-01 09:01:05,578 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 20 treesize of output 20 [2023-04-01 09:01:05,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:01:05,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:01:05,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-04-01 09:01:06,375 INFO L321 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2023-04-01 09:01:06,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 77 [2023-04-01 09:01:06,651 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-04-01 09:01:06,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2023-04-01 09:01:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:01:06,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:07,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:07,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924492584] [2023-04-01 09:01:07,300 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:07,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656246781] [2023-04-01 09:01:07,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656246781] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:01:07,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137524223] [2023-04-01 09:01:07,302 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:07,302 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:07,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:07,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:07,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:07,339 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:08,214 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:08,231 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:08,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:08,236 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:10,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2062#(and (not (= ~ARR_SIZE~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#length)_BEFORE_CALL_59| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_59| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_59| (Array Int Int)) (|v_main_~#array1~0.base_BEFORE_CALL_62| Int)) (and (not (= |v_old(#valid)_BEFORE_CALL_59| (select |v_old(#memory_int)_BEFORE_CALL_59| 1))) (= 2 (select |v_old(#length)_BEFORE_CALL_59| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 1) 0) (not (= |v_main_~#array1~0.base_BEFORE_CALL_62| 1)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_62| 2)) (= (select |v_old(#valid)_BEFORE_CALL_59| 1) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_62| |#StackHeapBarrier|)) (= (select |v_old(#length)_BEFORE_CALL_59| 2) 17) (not (= |v_main_~#array1~0.base_BEFORE_CALL_62| 0)) (= (select |v_old(#length)_BEFORE_CALL_59| 3) 12) (not (= |v_old(#valid)_BEFORE_CALL_59| |v_old(#length)_BEFORE_CALL_59|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 0) 48) (not (= |v_old(#length)_BEFORE_CALL_59| (select |v_old(#memory_int)_BEFORE_CALL_59| 1))) (= (select |v_old(#valid)_BEFORE_CALL_59| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_59| 0) 0) (not (= |v_main_~#array1~0.base_BEFORE_CALL_62| 3)) (= (select |v_old(#valid)_BEFORE_CALL_59| |v_main_~#array1~0.base_BEFORE_CALL_62|) 0) (= (select |v_old(#valid)_BEFORE_CALL_59| 3) 1))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:10,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:10,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:01:10,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-04-01 09:01:10,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457244862] [2023-04-01 09:01:10,740 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:10,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 09:01:10,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:10,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 09:01:10,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2233, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 09:01:10,742 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 19 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 09:01:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:11,477 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2023-04-01 09:01:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 09:01:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2023-04-01 09:01:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:11,478 INFO L225 Difference]: With dead ends: 71 [2023-04-01 09:01:11,478 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 09:01:11,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=311, Invalid=3349, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 09:01:11,480 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:11,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 139 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:01:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 09:01:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2023-04-01 09:01:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 09:01:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-04-01 09:01:11,495 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 37 [2023-04-01 09:01:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:11,496 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-04-01 09:01:11,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 09:01:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-04-01 09:01:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 09:01:11,496 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:11,496 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:11,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 09:01:11,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:11,701 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:11,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:11,701 INFO L85 PathProgramCache]: Analyzing trace with hash -868677026, now seen corresponding path program 5 times [2023-04-01 09:01:11,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:11,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525756062] [2023-04-01 09:01:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:11,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:11,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:11,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910170601] [2023-04-01 09:01:11,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:01:11,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:11,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:11,722 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:01:11,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 09:01:11,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 09:01:11,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:01:11,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:01:11,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:01:11,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:01:11,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525756062] [2023-04-01 09:01:11,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910170601] [2023-04-01 09:01:11,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910170601] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:11,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473687289] [2023-04-01 09:01:11,945 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:11,946 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:11,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:11,946 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:11,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:11,979 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:12,848 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:12,872 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:12,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:12,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:14,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2533#(and (not (= ~ARR_SIZE~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#valid)_BEFORE_CALL_75| (Array Int Int)) (|v_main_~#array1~0.base_BEFORE_CALL_75| Int) (|v_old(#memory_int)_BEFORE_CALL_75| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_75| (Array Int Int))) (and (not (= |v_main_~#array1~0.base_BEFORE_CALL_75| |#StackHeapBarrier|)) (= (select |v_old(#length)_BEFORE_CALL_75| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_75| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_75| 2) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_75| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_75| 1) 1) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_75| 1) 0)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_75| 3)) (= (select |v_old(#valid)_BEFORE_CALL_75| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_75| |v_main_~#array1~0.base_BEFORE_CALL_75|) 0) (= (select |v_old(#valid)_BEFORE_CALL_75| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_75| 2) 17) (= (select |v_old(#length)_BEFORE_CALL_75| 1) 2) (not (= (select |v_old(#memory_int)_BEFORE_CALL_75| 1) |v_old(#length)_BEFORE_CALL_75|)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_75| 0)) (not (= |v_old(#valid)_BEFORE_CALL_75| |v_old(#length)_BEFORE_CALL_75|)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_75| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_75| 1) |v_old(#valid)_BEFORE_CALL_75|)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:14,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:14,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:01:14,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 09:01:14,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832365214] [2023-04-01 09:01:14,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:14,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:01:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:14,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:01:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:01:14,963 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:15,247 INFO L93 Difference]: Finished difference Result 112 states and 145 transitions. [2023-04-01 09:01:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:01:15,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 38 [2023-04-01 09:01:15,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:15,249 INFO L225 Difference]: With dead ends: 112 [2023-04-01 09:01:15,249 INFO L226 Difference]: Without dead ends: 102 [2023-04-01 09:01:15,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 09:01:15,250 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:15,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 164 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:01:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-04-01 09:01:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2023-04-01 09:01:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 09:01:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2023-04-01 09:01:15,268 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 38 [2023-04-01 09:01:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:15,269 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2023-04-01 09:01:15,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2023-04-01 09:01:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 09:01:15,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:15,270 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:15,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 09:01:15,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:15,473 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:15,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:15,474 INFO L85 PathProgramCache]: Analyzing trace with hash 478178496, now seen corresponding path program 6 times [2023-04-01 09:01:15,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:15,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297492999] [2023-04-01 09:01:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:15,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:15,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:15,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180563682] [2023-04-01 09:01:15,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:01:15,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:15,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:15,499 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:01:15,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 09:01:15,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:01:15,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:01:15,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:01:15,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:01:15,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:01:15,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:15,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297492999] [2023-04-01 09:01:15,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180563682] [2023-04-01 09:01:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180563682] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928666287] [2023-04-01 09:01:15,683 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:15,683 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:15,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:15,683 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:15,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:15,707 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:16,536 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:16,560 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:16,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:16,564 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:18,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3075#(and (not (= ~ARR_SIZE~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#length)_BEFORE_CALL_91| (Array Int Int)) (|v_main_~#array1~0.base_BEFORE_CALL_88| Int) (|v_old(#memory_int)_BEFORE_CALL_91| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_91| (Array Int Int))) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_91| 1) |v_old(#length)_BEFORE_CALL_91|)) (= (select |v_old(#length)_BEFORE_CALL_91| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_91| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_91| |v_main_~#array1~0.base_BEFORE_CALL_88|) 0) (= (select |v_old(#valid)_BEFORE_CALL_91| 2) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_88| 3)) (= (select |v_old(#valid)_BEFORE_CALL_91| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_91| 3) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_88| 2)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_88| 1)) (not (= |v_old(#valid)_BEFORE_CALL_91| |v_old(#length)_BEFORE_CALL_91|)) (= (select |v_old(#length)_BEFORE_CALL_91| 2) 17) (not (= |v_main_~#array1~0.base_BEFORE_CALL_88| |#StackHeapBarrier|)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_88| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_91| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_91| (select |v_old(#memory_int)_BEFORE_CALL_91| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_91| 1) 0) 48) (= 2 (select |v_old(#length)_BEFORE_CALL_91| 1)))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:18,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:18,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:01:18,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 09:01:18,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898598246] [2023-04-01 09:01:18,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:18,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 09:01:18,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:18,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 09:01:18,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:01:18,654 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:18,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:18,870 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2023-04-01 09:01:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 09:01:18,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 38 [2023-04-01 09:01:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:18,871 INFO L225 Difference]: With dead ends: 98 [2023-04-01 09:01:18,871 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 09:01:18,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=210, Invalid=1430, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 09:01:18,872 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:18,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 171 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:01:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 09:01:18,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 60. [2023-04-01 09:01:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 16 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 09:01:18,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2023-04-01 09:01:18,890 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2023-04-01 09:01:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:18,890 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2023-04-01 09:01:18,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2023-04-01 09:01:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 09:01:18,891 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:18,891 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:18,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 09:01:19,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 09:01:19,102 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:19,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1863525517, now seen corresponding path program 7 times [2023-04-01 09:01:19,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:19,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976333063] [2023-04-01 09:01:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:19,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:19,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:19,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714075857] [2023-04-01 09:01:19,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:01:19,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:19,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:19,118 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:01:19,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 09:01:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:19,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 107 conjunts are in the unsatisfiable core [2023-04-01 09:01:19,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:19,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:01:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:01:19,265 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-01 09:01:19,269 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 20 treesize of output 20 [2023-04-01 09:01:19,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:01:19,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:01:19,313 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 42 treesize of output 35 [2023-04-01 09:01:19,364 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 56 treesize of output 55 [2023-04-01 09:01:20,319 INFO L321 Elim1Store]: treesize reduction 78, result has 46.2 percent of original size [2023-04-01 09:01:20,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2023-04-01 09:01:20,811 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-04-01 09:01:20,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2023-04-01 09:01:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:01:20,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:22,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976333063] [2023-04-01 09:01:22,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714075857] [2023-04-01 09:01:22,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714075857] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:01:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004483082] [2023-04-01 09:01:22,183 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:22,183 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:22,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:22,183 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:22,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:22,211 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:22,997 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:23,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:23,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:23,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:26,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3571#(and (not (= ~ARR_SIZE~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_107| (Array Int (Array Int Int))) (|v_main_~#array1~0.base_BEFORE_CALL_107| Int) (|v_old(#valid)_BEFORE_CALL_107| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_107| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 1) 0) (not (= 2 |v_main_~#array1~0.base_BEFORE_CALL_107|)) (not (= 3 |v_main_~#array1~0.base_BEFORE_CALL_107|)) (not (= |v_old(#valid)_BEFORE_CALL_107| |v_old(#length)_BEFORE_CALL_107|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_107| 1) |v_old(#length)_BEFORE_CALL_107|)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_107| 0)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_107| 1)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_107| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_107| 0) 0) (= (select |v_old(#length)_BEFORE_CALL_107| 2) 17) (= 12 (select |v_old(#length)_BEFORE_CALL_107| 3)) (not (= |#StackHeapBarrier| |v_main_~#array1~0.base_BEFORE_CALL_107|)) (= (select |v_old(#valid)_BEFORE_CALL_107| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_107| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_107| |v_main_~#array1~0.base_BEFORE_CALL_107|) 0) (not (= |v_old(#valid)_BEFORE_CALL_107| (select |v_old(#memory_int)_BEFORE_CALL_107| 1))) (= (select |v_old(#valid)_BEFORE_CALL_107| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_107| 1) 1))) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:26,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:26,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:01:26,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-04-01 09:01:26,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56583549] [2023-04-01 09:01:26,348 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:26,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 09:01:26,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:26,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 09:01:26,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=3366, Unknown=0, NotChecked=0, Total=3660 [2023-04-01 09:01:26,351 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 09:01:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:27,698 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2023-04-01 09:01:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 09:01:27,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2023-04-01 09:01:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:27,699 INFO L225 Difference]: With dead ends: 101 [2023-04-01 09:01:27,699 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 09:01:27,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=454, Invalid=5096, Unknown=0, NotChecked=0, Total=5550 [2023-04-01 09:01:27,701 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:27,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 201 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 09:01:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 09:01:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2023-04-01 09:01:27,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 20 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 09:01:27,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2023-04-01 09:01:27,721 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 39 [2023-04-01 09:01:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:27,722 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2023-04-01 09:01:27,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 09:01:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2023-04-01 09:01:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 09:01:27,722 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:27,723 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:27,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 09:01:27,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 09:01:27,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:27,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:27,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1859610208, now seen corresponding path program 8 times [2023-04-01 09:01:27,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:27,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080602266] [2023-04-01 09:01:27,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:27,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:27,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:27,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626443272] [2023-04-01 09:01:27,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:01:27,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:27,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:27,941 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:01:27,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 09:01:28,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 09:01:28,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:01:28,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:01:28,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:01:28,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:01:28,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080602266] [2023-04-01 09:01:28,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626443272] [2023-04-01 09:01:28,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626443272] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:28,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863253137] [2023-04-01 09:01:28,264 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:28,264 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:28,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:28,265 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:28,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:28,293 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:29,110 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:29,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:29,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:29,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:31,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4157#(and (not (= ~ARR_SIZE~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#length)_BEFORE_CALL_123| (Array Int Int)) (|v_main_~#array1~0.base_BEFORE_CALL_120| Int) (|v_old(#memory_int)_BEFORE_CALL_123| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_123| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_123| 1) 0) 48) (not (= (select |v_old(#memory_int)_BEFORE_CALL_123| 1) |v_old(#valid)_BEFORE_CALL_123|)) (= (select |v_old(#valid)_BEFORE_CALL_123| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_123| 2) 1) (not (= |v_main_~#array1~0.base_BEFORE_CALL_120| 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_123| 1) |v_old(#length)_BEFORE_CALL_123|)) (= (select |v_old(#length)_BEFORE_CALL_123| 2) 17) (= 2 (select |v_old(#length)_BEFORE_CALL_123| 1)) (= (select |v_old(#length)_BEFORE_CALL_123| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_123| 3) 1) (not (= |#StackHeapBarrier| |v_main_~#array1~0.base_BEFORE_CALL_120|)) (not (= 2 |v_main_~#array1~0.base_BEFORE_CALL_120|)) (not (= |v_old(#valid)_BEFORE_CALL_123| |v_old(#length)_BEFORE_CALL_123|)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_120| 0)) (not (= 3 |v_main_~#array1~0.base_BEFORE_CALL_120|)) (= (select |v_old(#valid)_BEFORE_CALL_123| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_123| |v_main_~#array1~0.base_BEFORE_CALL_120|) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_123| 1) 1) 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:31,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:31,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:01:31,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-01 09:01:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69568655] [2023-04-01 09:01:31,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:31,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 09:01:31,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 09:01:31,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 09:01:31,266 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:31,832 INFO L93 Difference]: Finished difference Result 191 states and 256 transitions. [2023-04-01 09:01:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 09:01:31,832 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 40 [2023-04-01 09:01:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:31,836 INFO L225 Difference]: With dead ends: 191 [2023-04-01 09:01:31,836 INFO L226 Difference]: Without dead ends: 180 [2023-04-01 09:01:31,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 09:01:31,841 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 134 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:31,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 169 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:01:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-04-01 09:01:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 85. [2023-04-01 09:01:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 24 states have call successors, (24), 9 states have call predecessors, (24), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 09:01:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2023-04-01 09:01:31,887 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 40 [2023-04-01 09:01:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:31,887 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2023-04-01 09:01:31,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2023-04-01 09:01:31,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 09:01:31,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:31,889 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:31,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 09:01:32,095 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 [2023-04-01 09:01:32,096 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:32,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash 662458430, now seen corresponding path program 9 times [2023-04-01 09:01:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:32,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843731868] [2023-04-01 09:01:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:32,110 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:32,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454953481] [2023-04-01 09:01:32,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:01:32,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:32,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:32,112 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) [2023-04-01 09:01:32,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 09:01:32,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:01:32,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:01:32,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:01:32,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 09:01:32,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 09:01:32,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:32,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843731868] [2023-04-01 09:01:32,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:32,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454953481] [2023-04-01 09:01:32,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454953481] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:01:32,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631364006] [2023-04-01 09:01:32,361 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:32,361 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:32,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:32,362 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:32,362 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:32,386 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:33,167 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:33,190 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:33,191 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:33,194 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:01:35,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4885#(and (not (= ~ARR_SIZE~0 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_139| (Array Int (Array Int Int))) (|v_main_~#array1~0.base_BEFORE_CALL_133| Int) (|v_old(#length)_BEFORE_CALL_139| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_139| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_139| 1) 1) (not (= |#StackHeapBarrier| |v_main_~#array1~0.base_BEFORE_CALL_133|)) (not (= |v_old(#length)_BEFORE_CALL_139| (select |v_old(#memory_int)_BEFORE_CALL_139| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_139| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_139| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_139| 0) 0) (not (= 2 |v_main_~#array1~0.base_BEFORE_CALL_133|)) (= (select |v_old(#valid)_BEFORE_CALL_139| |v_main_~#array1~0.base_BEFORE_CALL_133|) 0) (= (select |v_old(#length)_BEFORE_CALL_139| 2) 17) (= (select |v_old(#length)_BEFORE_CALL_139| 1) 2) (not (= 3 |v_main_~#array1~0.base_BEFORE_CALL_133|)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_133| 1)) (not (= |v_main_~#array1~0.base_BEFORE_CALL_133| 0)) (= (select |v_old(#valid)_BEFORE_CALL_139| 2) 1) (not (= |v_old(#valid)_BEFORE_CALL_139| (select |v_old(#memory_int)_BEFORE_CALL_139| 1))) (not (= |v_old(#valid)_BEFORE_CALL_139| |v_old(#length)_BEFORE_CALL_139|)) (= (select |v_old(#length)_BEFORE_CALL_139| 3) 12))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:01:35,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:01:35,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:01:35,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-04-01 09:01:35,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888207714] [2023-04-01 09:01:35,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:01:35,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 09:01:35,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:01:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 09:01:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 09:01:35,298 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:01:35,601 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2023-04-01 09:01:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:01:35,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 40 [2023-04-01 09:01:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:01:35,602 INFO L225 Difference]: With dead ends: 138 [2023-04-01 09:01:35,602 INFO L226 Difference]: Without dead ends: 133 [2023-04-01 09:01:35,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 09:01:35,603 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 72 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:01:35,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 216 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:01:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-04-01 09:01:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 86. [2023-04-01 09:01:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 24 states have call successors, (24), 9 states have call predecessors, (24), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-04-01 09:01:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2023-04-01 09:01:35,632 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 40 [2023-04-01 09:01:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:01:35,632 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2023-04-01 09:01:35,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 09:01:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2023-04-01 09:01:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 09:01:35,633 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:01:35,633 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:01:35,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-01 09:01:35,847 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 [2023-04-01 09:01:35,847 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:01:35,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:01:35,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1013731121, now seen corresponding path program 10 times [2023-04-01 09:01:35,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:01:35,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808529044] [2023-04-01 09:01:35,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:01:35,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:01:35,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:01:35,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424586157] [2023-04-01 09:01:35,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:01:35,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:01:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:01:35,878 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) [2023-04-01 09:01:35,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 09:01:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:01:36,102 WARN L260 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 127 conjunts are in the unsatisfiable core [2023-04-01 09:01:36,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:01:36,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:01:36,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 09:01:36,148 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-01 09:01:36,151 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 20 treesize of output 20 [2023-04-01 09:01:36,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:01:36,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 09:01:36,210 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 42 treesize of output 35 [2023-04-01 09:01:36,268 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 56 treesize of output 55 [2023-04-01 09:01:36,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 75 [2023-04-01 09:01:37,480 INFO L321 Elim1Store]: treesize reduction 104, result has 46.1 percent of original size [2023-04-01 09:01:37,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 8 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 90 treesize of output 133 [2023-04-01 09:01:38,404 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2023-04-01 09:01:38,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2023-04-01 09:01:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:01:38,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:01:40,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:01:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808529044] [2023-04-01 09:01:40,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:01:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424586157] [2023-04-01 09:01:40,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424586157] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:01:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388291703] [2023-04-01 09:01:40,116 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 09:01:40,116 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:01:40,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:01:40,117 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:01:40,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:01:40,152 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:01:40,805 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 09:01:40,827 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 09:01:40,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:01:40,831 INFO L180 IcfgInterpreter]: Interpretation finished