/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/array15_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:58:55,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:58:55,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:58:55,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:58:55,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:58:55,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:58:55,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:58:55,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:58:55,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:58:55,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:58:55,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:58:55,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:58:55,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:58:55,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:58:55,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:58:55,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:58:55,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:58:55,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:58:55,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:58:55,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:58:55,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:58:55,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:58:55,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:58:55,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:58:55,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 08:58:55,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 08:58:55,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 08:58:55,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 08:58:55,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 08:58:55,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 08:58:55,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:58:55,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:58:55,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:58:55,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:58:55,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:58:55,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:58:55,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:58:55,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:58:55,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:58:55,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:58:55,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:58:55,316 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 08:58:55,343 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:58:55,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:58:55,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:58:55,344 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:58:55,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:58:55,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:58:55,344 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:58:55,345 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:58:55,345 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:58:55,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:58:55,345 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:58:55,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:58:55,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:58:55,345 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:58:55,346 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:58:55,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:58:55,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:58:55,346 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:58:55,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:58:55,347 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:58:55,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:58:55,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:58:55,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:58:55,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:58:55,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:58:55,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:58:55,348 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:58:55,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:58:55,348 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:58:55,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:58:55,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:58:55,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:58:55,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:58:55,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:58:55,349 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:58:55,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:58:55,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:58:55,349 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:58:55,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:58:55,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:58:55,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:58:55,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:58:55,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:58:55,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:58:55,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:58:55,601 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:58:55,601 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:58:55,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array15_pattern.c [2023-04-01 08:58:56,762 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:58:56,939 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:58:56,939 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array15_pattern.c [2023-04-01 08:58:56,945 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd8f25b9/1adc5c205dcd4695b7293173b3718cb8/FLAG051355040 [2023-04-01 08:58:56,960 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebd8f25b9/1adc5c205dcd4695b7293173b3718cb8 [2023-04-01 08:58:56,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:58:56,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:58:56,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:58:56,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:58:56,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:58:56,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:58:56" (1/1) ... [2023-04-01 08:58:56,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454fffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:56, skipping insertion in model container [2023-04-01 08:58:56,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:58:56" (1/1) ... [2023-04-01 08:58:56,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:58:56,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:58:57,125 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/array15_pattern.c[1424,1437] [2023-04-01 08:58:57,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:58:57,154 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:58:57,164 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/array15_pattern.c[1424,1437] [2023-04-01 08:58:57,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:58:57,183 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:58:57,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57 WrapperNode [2023-04-01 08:58:57,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:58:57,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:58:57,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:58:57,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:58:57,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,222 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:58:57,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:58:57,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:58:57,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:58:57,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (1/1) ... [2023-04-01 08:58:57,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:58:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:57,252 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 08:58:57,254 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 08:58:57,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:58:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:58:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:58:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 08:58:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:58:57,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:58:57,282 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-04-01 08:58:57,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:58:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:58:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:58:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:58:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:58:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:58:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:58:57,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:58:57,344 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:58:57,346 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:58:57,491 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:58:57,567 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:58:57,567 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 08:58:57,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:58:57 BoogieIcfgContainer [2023-04-01 08:58:57,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:58:57,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:58:57,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:58:57,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:58:57,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:58:56" (1/3) ... [2023-04-01 08:58:57,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae5068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:58:57, skipping insertion in model container [2023-04-01 08:58:57,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:58:57" (2/3) ... [2023-04-01 08:58:57,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eae5068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:58:57, skipping insertion in model container [2023-04-01 08:58:57,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:58:57" (3/3) ... [2023-04-01 08:58:57,593 INFO L112 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2023-04-01 08:58:57,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:58:57,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:58:57,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:58:57,683 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;@5b3320b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:58:57,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:58:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:58:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 08:58:57,694 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:57,694 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 08:58:57,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:57,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:57,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1545787634, now seen corresponding path program 1 times [2023-04-01 08:58:57,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:57,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81491621] [2023-04-01 08:58:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:57,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:57,814 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:57,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813030760] [2023-04-01 08:58:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:57,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:57,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:57,819 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 08:58:57,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:58:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:57,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 08:58:57,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:57,948 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 08:58:57,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:58:57,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:57,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81491621] [2023-04-01 08:58:57,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:57,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813030760] [2023-04-01 08:58:57,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813030760] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:58:57,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:58:57,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 08:58:57,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803500922] [2023-04-01 08:58:57,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:58:57,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 08:58:57,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 08:58:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 08:58:57,980 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 08:58:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:58,042 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-04-01 08:58:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 08:58:58,044 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 08:58:58,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:58,050 INFO L225 Difference]: With dead ends: 44 [2023-04-01 08:58:58,051 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 08:58:58,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 08:58:58,055 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:58,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:58:58,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 08:58:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 08:58:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:58:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-04-01 08:58:58,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 17 [2023-04-01 08:58:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:58,097 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-04-01 08:58:58,097 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 08:58:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-04-01 08:58:58,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:58:58,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:58,100 INFO L195 NwaCegarLoop]: trace histogram [3, 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 08:58:58,111 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 08:58:58,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-01 08:58:58,312 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:58,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:58,313 INFO L85 PathProgramCache]: Analyzing trace with hash 174535855, now seen corresponding path program 1 times [2023-04-01 08:58:58,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:58,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316776925] [2023-04-01 08:58:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:58,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:58,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:58,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767037415] [2023-04-01 08:58:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:58,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:58,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:58,381 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 08:58:58,406 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 08:58:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:58,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 08:58:58,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:58:58,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:58:58,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316776925] [2023-04-01 08:58:58,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767037415] [2023-04-01 08:58:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767037415] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:58:58,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:58:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 08:58:58,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746341919] [2023-04-01 08:58:58,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:58:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 08:58:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 08:58:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:58:58,549 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:58:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:58,632 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2023-04-01 08:58:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:58:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-01 08:58:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:58,635 INFO L225 Difference]: With dead ends: 45 [2023-04-01 08:58:58,635 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 08:58:58,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 08:58:58,639 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:58,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:58:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 08:58:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-04-01 08:58:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:58:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-04-01 08:58:58,656 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 25 [2023-04-01 08:58:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:58,656 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-04-01 08:58:58,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:58:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-04-01 08:58:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 08:58:58,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:58,658 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 08:58:58,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:58:58,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-01 08:58:58,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:58,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash 32459199, now seen corresponding path program 1 times [2023-04-01 08:58:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:58,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016631894] [2023-04-01 08:58:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:58,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:58,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:58,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978959456] [2023-04-01 08:58:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:58,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:58,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:58,882 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 08:58:58,891 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 08:58:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:58,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:58:58,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:58:58,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 08:58:58,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:58:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016631894] [2023-04-01 08:58:58,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:58:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978959456] [2023-04-01 08:58:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978959456] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:58:58,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:58:58,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 08:58:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139742665] [2023-04-01 08:58:58,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:58:58,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 08:58:58,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:58:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 08:58:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 08:58:58,967 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:58:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:58:59,001 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-04-01 08:58:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 08:58:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-01 08:58:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:58:59,002 INFO L225 Difference]: With dead ends: 48 [2023-04-01 08:58:59,002 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 08:58:59,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:58:59,003 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:58:59,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 48 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:58:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 08:58:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 08:58:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:58:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-04-01 08:58:59,009 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 29 [2023-04-01 08:58:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:58:59,009 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-04-01 08:58:59,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 08:58:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-04-01 08:58:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 08:58:59,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:58:59,010 INFO L195 NwaCegarLoop]: trace histogram [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 08:58:59,031 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 08:58:59,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:59,216 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:58:59,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:58:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash -998802000, now seen corresponding path program 1 times [2023-04-01 08:58:59,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:58:59,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856657412] [2023-04-01 08:58:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:59,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:58:59,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:58:59,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417883792] [2023-04-01 08:58:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:58:59,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:58:59,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:58:59,241 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 08:58:59,243 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 08:58:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:58:59,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 08:58:59,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:58:59,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:58:59,816 INFO L321 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2023-04-01 08:58:59,816 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 67 [2023-04-01 08:58:59,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 08:59:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:59:00,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:03,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856657412] [2023-04-01 08:59:03,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417883792] [2023-04-01 08:59:03,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417883792] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:59:03,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771280216] [2023-04-01 08:59:03,562 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:03,562 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:03,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:03,572 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:03,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:03,716 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:05,952 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:06,256 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:06,369 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:06,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:06,375 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:11,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (exists ((|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (v_main_~sum~0_BEFORE_CALL_8 Int) (|v_old(~ARR_SIZE~0)_BEFORE_CALL_7| Int) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int)) (v_main_~num~0_BEFORE_CALL_5 Int) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (v_main_~index1~0_BEFORE_CALL_6 Int) (|v_main_~#array~0.offset_BEFORE_CALL_7| Int) (v_main_~temp~0_BEFORE_CALL_1 Int) (|v_main_~#array~0.base_BEFORE_CALL_7| Int) (v_main_~index2~0_BEFORE_CALL_5 Int) (v_main_~row~0_BEFORE_CALL_3 Int)) (and (< (* 2 ~ARR_SIZE~0) (+ 2 v_main_~sum~0_BEFORE_CALL_8)) (or (and (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= |v_main_~#array~0.offset_BEFORE_CALL_7| 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_7| |#StackHeapBarrier|)) (not (= |v_main_~#array~0.base_BEFORE_CALL_7| 0)) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (not (= |v_main_~#array~0.base_BEFORE_CALL_7| 2)) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= v_main_~sum~0_BEFORE_CALL_8 0) (not (= ~ARR_SIZE~0 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= 18 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (not (= |v_main_~#array~0.base_BEFORE_CALL_7| 3)) (= v_main_~row~0_BEFORE_CALL_3 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (= (+ v_main_~num~0_BEFORE_CALL_5 1) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (not (= |v_main_~#array~0.base_BEFORE_CALL_7| 1)) (not (= |#StackHeapBarrier| 0)) (not (= v_main_~index2~0_BEFORE_CALL_5 ~ARR_SIZE~0)) (= |v_old(~ARR_SIZE~0)_BEFORE_CALL_7| 0) (not (= v_main_~index1~0_BEFORE_CALL_6 ~ARR_SIZE~0)) (= |#NULL.offset| 0) (= v_main_~temp~0_BEFORE_CALL_1 0) (= (select |v_old(#valid)_BEFORE_CALL_7| |v_main_~#array~0.base_BEFORE_CALL_7|) 0) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (= |#NULL.base| 0)) (not (= (+ ~ARR_SIZE~0 1) v_main_~row~0_BEFORE_CALL_3))) (<= ~ARR_SIZE~0 v_main_~row~0_BEFORE_CALL_3))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:59:11,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:11,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:59:11,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-04-01 08:59:11,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117407357] [2023-04-01 08:59:11,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:11,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 08:59:11,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:11,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 08:59:11,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1957, Unknown=2, NotChecked=0, Total=2162 [2023-04-01 08:59:11,677 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 17 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:59:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:12,183 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2023-04-01 08:59:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 08:59:12,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-04-01 08:59:12,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:12,185 INFO L225 Difference]: With dead ends: 63 [2023-04-01 08:59:12,185 INFO L226 Difference]: Without dead ends: 58 [2023-04-01 08:59:12,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=325, Invalid=2753, Unknown=2, NotChecked=0, Total=3080 [2023-04-01 08:59:12,193 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:12,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 111 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 08:59:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-04-01 08:59:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2023-04-01 08:59:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:59:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-04-01 08:59:12,204 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 31 [2023-04-01 08:59:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:12,204 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-04-01 08:59:12,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 12 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:59:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-04-01 08:59:12,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:59:12,206 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:12,207 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 08:59:12,215 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 08:59:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:12,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:12,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:12,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1221806298, now seen corresponding path program 2 times [2023-04-01 08:59:12,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:12,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773351522] [2023-04-01 08:59:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:12,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:12,450 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:12,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610961210] [2023-04-01 08:59:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:59:12,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:12,454 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 08:59:12,456 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 08:59:12,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:59:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:59:12,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:59:12,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 08:59:12,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 08:59:12,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773351522] [2023-04-01 08:59:12,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:12,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610961210] [2023-04-01 08:59:12,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610961210] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:59:12,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2100711672] [2023-04-01 08:59:12,620 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:12,620 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:12,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:12,621 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:12,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:12,660 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:13,997 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:14,253 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:14,335 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:14,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:14,341 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:17,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1177#(and (exists ((v_main_~row~0_BEFORE_CALL_7 Int) (|v_main_~#array~0.offset_BEFORE_CALL_14| Int) (|v_old(#length)_BEFORE_CALL_17| (Array Int Int)) (v_main_~num~0_BEFORE_CALL_12 Int) (|v_old(~ARR_SIZE~0)_BEFORE_CALL_17| Int) (|v_main_~#array~0.base_BEFORE_CALL_14| Int) (|v_old(#memory_int)_BEFORE_CALL_17| (Array Int (Array Int Int))) (v_main_~index1~0_BEFORE_CALL_13 Int) (|v_old(#valid)_BEFORE_CALL_17| (Array Int Int)) (v_main_~temp~0_BEFORE_CALL_2 Int) (v_main_~index2~0_BEFORE_CALL_12 Int) (v_main_~sum~0_BEFORE_CALL_15 Int)) (and (or (and (= |v_old(~ARR_SIZE~0)_BEFORE_CALL_17| 0) (not (= ~ARR_SIZE~0 0)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_17| 1) 1) (= v_main_~sum~0_BEFORE_CALL_15 0) (= |v_main_~#array~0.offset_BEFORE_CALL_14| 0) (= v_main_~row~0_BEFORE_CALL_7 0) (not (= |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_14|)) (= (select |v_old(#length)_BEFORE_CALL_17| 3) 12) (= (select |v_old(#length)_BEFORE_CALL_17| 2) 18) (= v_main_~temp~0_BEFORE_CALL_2 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_14| 1)) (not (= ~ARR_SIZE~0 v_main_~index2~0_BEFORE_CALL_12)) (= (select |v_old(#valid)_BEFORE_CALL_17| |v_main_~#array~0.base_BEFORE_CALL_14|) 0) (not (= 2 |v_main_~#array~0.base_BEFORE_CALL_14|)) (not (= |#StackHeapBarrier| 0)) (= (+ v_main_~num~0_BEFORE_CALL_12 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_17| |v_old(#length)_BEFORE_CALL_17|)) (not (= |v_main_~#array~0.base_BEFORE_CALL_14| 0)) (= (select |v_old(#length)_BEFORE_CALL_17| 1) 2) (= |#NULL.offset| 0) (not (= 3 |v_main_~#array~0.base_BEFORE_CALL_14|)) (= (select |v_old(#valid)_BEFORE_CALL_17| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_17| (select |v_old(#memory_int)_BEFORE_CALL_17| 1))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1)) (not (= v_main_~index1~0_BEFORE_CALL_13 ~ARR_SIZE~0)) (= (select |v_old(#valid)_BEFORE_CALL_17| 2) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_17| 1) |v_old(#length)_BEFORE_CALL_17|)) (= (select |v_old(#valid)_BEFORE_CALL_17| 3) 1) (= |#NULL.base| 0)) (not (= (+ ~ARR_SIZE~0 1) v_main_~row~0_BEFORE_CALL_7))) (<= ~ARR_SIZE~0 v_main_~row~0_BEFORE_CALL_7) (< (* 2 ~ARR_SIZE~0) (+ 2 v_main_~sum~0_BEFORE_CALL_15)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:59:17,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:17,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:59:17,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-04-01 08:59:17,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630263505] [2023-04-01 08:59:17,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:17,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 08:59:17,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 08:59:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 08:59:17,632 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 08:59:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:17,769 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-04-01 08:59:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 08:59:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-04-01 08:59:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:17,770 INFO L225 Difference]: With dead ends: 74 [2023-04-01 08:59:17,771 INFO L226 Difference]: Without dead ends: 57 [2023-04-01 08:59:17,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 08:59:17,774 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:17,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 89 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:59:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-01 08:59:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-04-01 08:59:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:59:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-04-01 08:59:17,797 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-04-01 08:59:17,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:17,798 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-04-01 08:59:17,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 08:59:17,798 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-04-01 08:59:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 08:59:17,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:17,799 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2023-04-01 08:59:17,805 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 08:59:18,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:18,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:18,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1686954521, now seen corresponding path program 3 times [2023-04-01 08:59:18,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:18,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455198284] [2023-04-01 08:59:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:18,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:18,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398735728] [2023-04-01 08:59:18,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:59:18,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:18,016 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 08:59:18,036 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 08:59:18,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:59:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:59:18,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:59:18,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:18,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:59:18,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 08:59:18,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:18,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455198284] [2023-04-01 08:59:18,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:18,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398735728] [2023-04-01 08:59:18,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398735728] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:59:18,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [933946348] [2023-04-01 08:59:18,156 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:18,156 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:18,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:18,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:18,157 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:18,197 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:19,371 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:19,608 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:19,673 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:19,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:19,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:22,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1636#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:59:22,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:22,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:59:22,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 08:59:22,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047423771] [2023-04-01 08:59:22,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:22,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 08:59:22,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:22,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 08:59:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=818, Unknown=1, NotChecked=0, Total=930 [2023-04-01 08:59:22,878 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 08:59:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:23,081 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2023-04-01 08:59:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 08:59:23,082 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 08:59:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:23,082 INFO L225 Difference]: With dead ends: 87 [2023-04-01 08:59:23,083 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 08:59:23,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=156, Invalid=1175, Unknown=1, NotChecked=0, Total=1332 [2023-04-01 08:59:23,084 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:23,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 80 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:59:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 08:59:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2023-04-01 08:59:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:59:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2023-04-01 08:59:23,103 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 34 [2023-04-01 08:59:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:23,110 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2023-04-01 08:59:23,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 08:59:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2023-04-01 08:59:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 08:59:23,113 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:23,114 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-04-01 08:59:23,134 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 08:59:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:23,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:23,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1028255169, now seen corresponding path program 4 times [2023-04-01 08:59:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:23,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098449911] [2023-04-01 08:59:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:23,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:23,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021187281] [2023-04-01 08:59:23,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:59:23,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:23,332 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 08:59:23,334 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 08:59:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:59:23,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 08:59:23,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:59:23,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 08:59:23,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:23,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098449911] [2023-04-01 08:59:23,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:23,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021187281] [2023-04-01 08:59:23,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021187281] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:59:23,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857864382] [2023-04-01 08:59:23,473 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:23,473 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:23,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:23,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:23,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:23,501 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:24,634 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:24,837 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:24,906 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:24,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:24,911 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:26,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2130#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:59:26,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:26,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:59:26,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 08:59:26,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211678515] [2023-04-01 08:59:26,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:26,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 08:59:26,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:26,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 08:59:26,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2023-04-01 08:59:26,438 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 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 08:59:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:26,536 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2023-04-01 08:59:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 08:59:26,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 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 35 [2023-04-01 08:59:26,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:26,537 INFO L225 Difference]: With dead ends: 63 [2023-04-01 08:59:26,537 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 08:59:26,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 08:59:26,539 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:26,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 85 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:59:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 08:59:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 08:59:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:59:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-04-01 08:59:26,545 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 35 [2023-04-01 08:59:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:26,546 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-04-01 08:59:26,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (8), 2 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 08:59:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-04-01 08:59:26,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 08:59:26,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:26,547 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 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 08:59:26,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 08:59:26,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:26,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:26,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:26,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1228598671, now seen corresponding path program 5 times [2023-04-01 08:59:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:26,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319678845] [2023-04-01 08:59:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:26,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:26,763 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:26,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194151476] [2023-04-01 08:59:26,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:59:26,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:26,765 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 08:59:26,770 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 08:59:27,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 08:59:27,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:59:27,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 82 conjunts are in the unsatisfiable core [2023-04-01 08:59:27,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:27,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:59:27,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 08:59:27,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:59:27,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-04-01 08:59:27,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:59:27,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-04-01 08:59:27,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:27,843 INFO L321 Elim1Store]: treesize reduction 135, result has 29.3 percent of original size [2023-04-01 08:59:27,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 106 treesize of output 123 [2023-04-01 08:59:28,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:28,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:28,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:28,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:59:28,903 INFO L321 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2023-04-01 08:59:28,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 124 treesize of output 54 [2023-04-01 08:59:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 08:59:29,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:30,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319678845] [2023-04-01 08:59:30,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194151476] [2023-04-01 08:59:30,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194151476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:59:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457128774] [2023-04-01 08:59:30,604 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:30,604 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:30,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:30,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:30,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:30,634 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:31,732 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:31,931 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:32,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:32,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:32,007 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:37,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2551#(and (exists ((|v_main_~#array~0.offset_BEFORE_CALL_37| Int) (|v_old(#length)_BEFORE_CALL_47| (Array Int Int)) (v_main_~row~0_BEFORE_CALL_19 Int) (|v_old(#valid)_BEFORE_CALL_47| (Array Int Int)) (|v_old(~ARR_SIZE~0)_BEFORE_CALL_47| Int) (v_main_~num~0_BEFORE_CALL_35 Int) (|v_main_~#array~0.base_BEFORE_CALL_37| Int) (|v_old(#memory_int)_BEFORE_CALL_47| (Array Int (Array Int Int))) (v_main_~index1~0_BEFORE_CALL_35 Int) (v_main_~index2~0_BEFORE_CALL_33 Int) (v_main_~sum~0_BEFORE_CALL_39 Int) (v_main_~temp~0_BEFORE_CALL_5 Int)) (and (< (* 2 ~ARR_SIZE~0) (+ 2 v_main_~sum~0_BEFORE_CALL_39)) (or (not (= (+ ~ARR_SIZE~0 1) v_main_~row~0_BEFORE_CALL_19)) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_47| 1) |v_old(#valid)_BEFORE_CALL_47|)) (not (= ~ARR_SIZE~0 v_main_~index2~0_BEFORE_CALL_33)) (= (select |v_old(#valid)_BEFORE_CALL_47| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_47| |v_main_~#array~0.base_BEFORE_CALL_37|) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_47| 1)) (= (select |v_old(#length)_BEFORE_CALL_47| 2) 18) (= v_main_~sum~0_BEFORE_CALL_39 0) (not (= ~ARR_SIZE~0 0)) (not (= |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_37|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 1) 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_37| 1)) (not (= 2 |v_main_~#array~0.base_BEFORE_CALL_37|)) (not (= 3 |v_main_~#array~0.base_BEFORE_CALL_37|)) (= |v_old(~ARR_SIZE~0)_BEFORE_CALL_47| 0) (= |v_main_~#array~0.offset_BEFORE_CALL_37| 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_37| 0)) (not (= |v_old(#valid)_BEFORE_CALL_47| |v_old(#length)_BEFORE_CALL_47|)) (not (= |#StackHeapBarrier| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_47| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_47| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_47| 0) 0) (= v_main_~temp~0_BEFORE_CALL_5 0) (not (= v_main_~index1~0_BEFORE_CALL_35 ~ARR_SIZE~0)) (= v_main_~row~0_BEFORE_CALL_19 0) (= |#NULL.offset| 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_47| 1) |v_old(#length)_BEFORE_CALL_47|)) (= (select |v_old(#length)_BEFORE_CALL_47| 3) 12) (= 0 (+ v_main_~num~0_BEFORE_CALL_35 1)) (= (select |v_old(#valid)_BEFORE_CALL_47| 1) 1) (= |#NULL.base| 0))) (<= ~ARR_SIZE~0 v_main_~row~0_BEFORE_CALL_19))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:59:37,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:37,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 08:59:37,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-04-01 08:59:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348418674] [2023-04-01 08:59:37,837 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:37,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 08:59:37,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 08:59:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3767, Unknown=1, NotChecked=0, Total=4160 [2023-04-01 08:59:37,839 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:59:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:42,233 INFO L93 Difference]: Finished difference Result 107 states and 138 transitions. [2023-04-01 08:59:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 08:59:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2023-04-01 08:59:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:42,235 INFO L225 Difference]: With dead ends: 107 [2023-04-01 08:59:42,235 INFO L226 Difference]: Without dead ends: 95 [2023-04-01 08:59:42,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=530, Invalid=4869, Unknown=3, NotChecked=0, Total=5402 [2023-04-01 08:59:42,237 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:42,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 229 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 08:59:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-04-01 08:59:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2023-04-01 08:59:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:59:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-04-01 08:59:42,254 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 41 [2023-04-01 08:59:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:42,254 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-04-01 08:59:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:59:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-04-01 08:59:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 08:59:42,255 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:42,255 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 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 08:59:42,262 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 08:59:42,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 08:59:42,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:42,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash 582538373, now seen corresponding path program 6 times [2023-04-01 08:59:42,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:42,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956857149] [2023-04-01 08:59:42,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:42,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:42,470 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530028202] [2023-04-01 08:59:42,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:59:42,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:42,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:42,472 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 08:59:42,476 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 08:59:42,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:59:42,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:59:42,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:59:42,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 08:59:42,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 08:59:42,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956857149] [2023-04-01 08:59:42,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530028202] [2023-04-01 08:59:42,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530028202] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:59:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1146089610] [2023-04-01 08:59:42,664 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:42,664 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:42,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:42,664 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:42,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:42,697 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:43,663 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:43,839 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:43,899 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:43,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:43,903 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:47,239 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3149#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_old(#length)_BEFORE_CALL_57| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_57| (Array Int Int)) (|v_main_~#array~0.offset_BEFORE_CALL_44| Int) (v_main_~row~0_BEFORE_CALL_23 Int) (|v_old(~ARR_SIZE~0)_BEFORE_CALL_57| Int) (v_main_~index1~0_BEFORE_CALL_42 Int) (|v_main_~#array~0.base_BEFORE_CALL_44| Int) (|v_old(#memory_int)_BEFORE_CALL_57| (Array Int (Array Int Int))) (v_main_~sum~0_BEFORE_CALL_46 Int) (v_main_~index2~0_BEFORE_CALL_40 Int) (v_main_~temp~0_BEFORE_CALL_6 Int) (v_main_~num~0_BEFORE_CALL_42 Int)) (and (< (* 2 ~ARR_SIZE~0) (+ 2 v_main_~sum~0_BEFORE_CALL_46)) (or (and (not (= v_main_~index1~0_BEFORE_CALL_42 ~ARR_SIZE~0)) (not (= ~ARR_SIZE~0 v_main_~index2~0_BEFORE_CALL_40)) (= (+ v_main_~num~0_BEFORE_CALL_42 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 0) 48) (not (= |v_main_~#array~0.base_BEFORE_CALL_44| 0)) (= v_main_~temp~0_BEFORE_CALL_6 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_57| 1) |v_old(#valid)_BEFORE_CALL_57|)) (= (select |v_old(#length)_BEFORE_CALL_57| 3) 12) (not (= ~ARR_SIZE~0 0)) (= (select |v_old(#valid)_BEFORE_CALL_57| 0) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_57| 1)) (= (select |v_old(#valid)_BEFORE_CALL_57| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_57| 2) 1) (= 18 (select |v_old(#length)_BEFORE_CALL_57| 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_57| 1) |v_old(#length)_BEFORE_CALL_57|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_57| 1) 1) 0) (not (= |#StackHeapBarrier| 0)) (= |v_main_~#array~0.offset_BEFORE_CALL_44| 0) (= v_main_~row~0_BEFORE_CALL_23 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_44| 1)) (not (= 2 |v_main_~#array~0.base_BEFORE_CALL_44|)) (= (select |v_old(#valid)_BEFORE_CALL_57| |v_main_~#array~0.base_BEFORE_CALL_44|) 0) (not (= 3 |v_main_~#array~0.base_BEFORE_CALL_44|)) (= |#NULL.offset| 0) (= (select |v_old(#valid)_BEFORE_CALL_57| 3) 1) (= |v_old(~ARR_SIZE~0)_BEFORE_CALL_57| 0) (= v_main_~sum~0_BEFORE_CALL_46 0) (not (= |v_old(#valid)_BEFORE_CALL_57| |v_old(#length)_BEFORE_CALL_57|)) (not (= |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_44|)) (= |#NULL.base| 0)) (not (= (+ ~ARR_SIZE~0 1) v_main_~row~0_BEFORE_CALL_23))) (<= ~ARR_SIZE~0 v_main_~row~0_BEFORE_CALL_23))) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-01 08:59:47,239 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:47,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:59:47,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 08:59:47,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493167327] [2023-04-01 08:59:47,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:47,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 08:59:47,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 08:59:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 08:59:47,242 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 08:59:47,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:47,404 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2023-04-01 08:59:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 08:59:47,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 42 [2023-04-01 08:59:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:47,406 INFO L225 Difference]: With dead ends: 162 [2023-04-01 08:59:47,406 INFO L226 Difference]: Without dead ends: 116 [2023-04-01 08:59:47,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 08:59:47,407 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:47,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 83 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:59:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-04-01 08:59:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2023-04-01 08:59:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 08:59:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2023-04-01 08:59:47,431 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 42 [2023-04-01 08:59:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:47,432 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2023-04-01 08:59:47,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 08:59:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2023-04-01 08:59:47,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 08:59:47,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:47,433 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 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 08:59:47,440 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 08:59:47,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:47,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:47,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash -516605587, now seen corresponding path program 7 times [2023-04-01 08:59:47,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:47,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719347966] [2023-04-01 08:59:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:47,646 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:47,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649275476] [2023-04-01 08:59:47,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:59:47,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:47,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:47,648 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 08:59:47,656 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 08:59:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:59:47,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:59:47,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 08:59:47,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:59:47,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:47,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719347966] [2023-04-01 08:59:47,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649275476] [2023-04-01 08:59:47,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649275476] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:59:47,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276143914] [2023-04-01 08:59:47,840 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:47,840 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:47,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:47,840 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:47,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:47,863 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:48,848 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:49,043 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:49,097 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:49,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:49,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:51,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3887#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#valid)_BEFORE_CALL_67| (Array Int Int)) (v_main_~row~0_BEFORE_CALL_27 Int) (v_main_~index2~0_BEFORE_CALL_47 Int) (|v_old(~ARR_SIZE~0)_BEFORE_CALL_67| Int) (|v_main_~#array~0.offset_BEFORE_CALL_51| Int) (|v_old(#length)_BEFORE_CALL_67| (Array Int Int)) (v_main_~sum~0_BEFORE_CALL_53 Int) (|v_old(#memory_int)_BEFORE_CALL_67| (Array Int (Array Int Int))) (v_main_~num~0_BEFORE_CALL_49 Int) (v_main_~index1~0_BEFORE_CALL_49 Int) (|v_main_~#array~0.base_BEFORE_CALL_51| Int) (v_main_~temp~0_BEFORE_CALL_7 Int)) (and (< (* 2 ~ARR_SIZE~0) (+ 2 v_main_~sum~0_BEFORE_CALL_53)) (<= ~ARR_SIZE~0 v_main_~row~0_BEFORE_CALL_27) (or (and (= |v_old(~ARR_SIZE~0)_BEFORE_CALL_67| 0) (= (select |v_old(#length)_BEFORE_CALL_67| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_67| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_67| 0) 0) (not (= ~ARR_SIZE~0 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#length)_BEFORE_CALL_67|)) (= (+ v_main_~num~0_BEFORE_CALL_49 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_67| |v_main_~#array~0.base_BEFORE_CALL_51|) 0) (= (select |v_old(#valid)_BEFORE_CALL_67| 1) 1) (= v_main_~sum~0_BEFORE_CALL_53 0) (= (select |v_old(#valid)_BEFORE_CALL_67| 2) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 0) 48) (= (select |v_old(#length)_BEFORE_CALL_67| 2) 18) (= (select (select |v_old(#memory_int)_BEFORE_CALL_67| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_67| |v_old(#length)_BEFORE_CALL_67|)) (not (= 2 |v_main_~#array~0.base_BEFORE_CALL_51|)) (not (= |#StackHeapBarrier| 0)) (not (= |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_51|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_67| 1) |v_old(#valid)_BEFORE_CALL_67|)) (= (select |v_old(#length)_BEFORE_CALL_67| 3) 12) (not (= |v_main_~#array~0.base_BEFORE_CALL_51| 0)) (not (= v_main_~index1~0_BEFORE_CALL_49 ~ARR_SIZE~0)) (= |#NULL.offset| 0) (= |v_main_~#array~0.offset_BEFORE_CALL_51| 0) (= v_main_~row~0_BEFORE_CALL_27 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_51| 1)) (not (= ~ARR_SIZE~0 v_main_~index2~0_BEFORE_CALL_47)) (= v_main_~temp~0_BEFORE_CALL_7 0) (not (= 3 |v_main_~#array~0.base_BEFORE_CALL_51|)) (= |#NULL.base| 0)) (not (= (+ ~ARR_SIZE~0 1) v_main_~row~0_BEFORE_CALL_27))))))' at error location [2023-04-01 08:59:51,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:51,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:59:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-04-01 08:59:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482120210] [2023-04-01 08:59:51,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:51,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 08:59:51,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 08:59:51,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 08:59:51,475 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (8), 2 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 08:59:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:51,703 INFO L93 Difference]: Finished difference Result 166 states and 207 transitions. [2023-04-01 08:59:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 08:59:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (8), 2 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 43 [2023-04-01 08:59:51,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:51,704 INFO L225 Difference]: With dead ends: 166 [2023-04-01 08:59:51,704 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 08:59:51,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 08:59:51,705 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:51,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:59:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 08:59:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2023-04-01 08:59:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 76 states have (on average 1.263157894736842) internal successors, (96), 76 states have internal predecessors, (96), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 08:59:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2023-04-01 08:59:51,727 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 43 [2023-04-01 08:59:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:51,727 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2023-04-01 08:59:51,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (8), 2 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 08:59:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2023-04-01 08:59:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 08:59:51,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:51,728 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 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 08:59:51,732 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 08:59:51,928 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,SelfDestructingSolverStorable9 [2023-04-01 08:59:51,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:51,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1398769198, now seen corresponding path program 8 times [2023-04-01 08:59:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:51,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158212777] [2023-04-01 08:59:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:51,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:51,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637958143] [2023-04-01 08:59:51,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:59:51,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:51,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:51,939 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 08:59:51,942 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 08:59:52,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 08:59:52,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:59:52,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 08:59:52,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:59:52,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:59:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 08:59:52,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:59:52,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158212777] [2023-04-01 08:59:52,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 08:59:52,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637958143] [2023-04-01 08:59:52,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637958143] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:59:52,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146232104] [2023-04-01 08:59:52,153 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 08:59:52,153 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:59:52,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:59:52,153 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:59:52,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:59:52,183 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 08:59:53,101 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 08:59:53,265 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 95 for LOIs [2023-04-01 08:59:53,317 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 08:59:53,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:59:53,321 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:59:55,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4666#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#valid)_BEFORE_CALL_77| (Array Int Int)) (|v_main_~#array~0.offset_BEFORE_CALL_58| Int) (v_main_~index1~0_BEFORE_CALL_56 Int) (|v_old(~ARR_SIZE~0)_BEFORE_CALL_77| Int) (v_main_~row~0_BEFORE_CALL_31 Int) (v_main_~sum~0_BEFORE_CALL_60 Int) (|v_old(#length)_BEFORE_CALL_77| (Array Int Int)) (v_main_~num~0_BEFORE_CALL_56 Int) (|v_old(#memory_int)_BEFORE_CALL_77| (Array Int (Array Int Int))) (|v_main_~#array~0.base_BEFORE_CALL_58| Int) (v_main_~index2~0_BEFORE_CALL_54 Int) (v_main_~temp~0_BEFORE_CALL_8 Int)) (and (< (* 2 ~ARR_SIZE~0) (+ 2 v_main_~sum~0_BEFORE_CALL_60)) (or (not (= (+ ~ARR_SIZE~0 1) v_main_~row~0_BEFORE_CALL_31)) (and (= (select |v_old(#valid)_BEFORE_CALL_77| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_77| 3) 12) (not (= 2 |v_main_~#array~0.base_BEFORE_CALL_58|)) (= |v_old(~ARR_SIZE~0)_BEFORE_CALL_77| 0) (= |v_main_~#array~0.offset_BEFORE_CALL_58| 0) (= (select |v_old(#valid)_BEFORE_CALL_77| 2) 1) (not (= ~ARR_SIZE~0 0)) (= (select |v_old(#valid)_BEFORE_CALL_77| |v_main_~#array~0.base_BEFORE_CALL_58|) 0) (= 18 (select |v_old(#length)_BEFORE_CALL_77| 2)) (= v_main_~row~0_BEFORE_CALL_31 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 0)) (= (+ v_main_~num~0_BEFORE_CALL_56 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_77| 1) |v_old(#valid)_BEFORE_CALL_77|)) (not (= |v_old(#valid)_BEFORE_CALL_77| |v_old(#length)_BEFORE_CALL_77|)) (not (= ~ARR_SIZE~0 v_main_~index2~0_BEFORE_CALL_54)) (= v_main_~temp~0_BEFORE_CALL_8 0) (not (= 3 |v_main_~#array~0.base_BEFORE_CALL_58|)) (not (= |v_main_~#array~0.base_BEFORE_CALL_58| 0)) (= 2 (select |v_old(#length)_BEFORE_CALL_77| 1)) (not (= |#StackHeapBarrier| 0)) (not (= v_main_~index1~0_BEFORE_CALL_56 ~ARR_SIZE~0)) (= v_main_~sum~0_BEFORE_CALL_60 0) (not (= |#StackHeapBarrier| |v_main_~#array~0.base_BEFORE_CALL_58|)) (= |#NULL.offset| 0) (not (= |v_main_~#array~0.base_BEFORE_CALL_58| 1)) (= (select |v_old(#valid)_BEFORE_CALL_77| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_77| 1) 1) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_77| 1) |v_old(#length)_BEFORE_CALL_77|)) (= (select |v_old(#valid)_BEFORE_CALL_77| 3) 1) (= |#NULL.base| 0))) (<= ~ARR_SIZE~0 v_main_~row~0_BEFORE_CALL_31))))' at error location [2023-04-01 08:59:55,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:59:55,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 08:59:55,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 08:59:55,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793122662] [2023-04-01 08:59:55,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 08:59:55,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 08:59:55,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:59:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 08:59:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 08:59:55,633 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 08:59:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:59:55,826 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2023-04-01 08:59:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 08:59:55,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2023-04-01 08:59:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:59:55,827 INFO L225 Difference]: With dead ends: 142 [2023-04-01 08:59:55,827 INFO L226 Difference]: Without dead ends: 83 [2023-04-01 08:59:55,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 08:59:55,828 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:59:55,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 111 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:59:55,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-04-01 08:59:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-04-01 08:59:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 67 states have internal predecessors, (79), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 08:59:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-04-01 08:59:55,849 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 45 [2023-04-01 08:59:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:59:55,849 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-04-01 08:59:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 08:59:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-04-01 08:59:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 08:59:55,850 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:59:55,850 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:59:55,859 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 08:59:56,059 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,SelfDestructingSolverStorable10 [2023-04-01 08:59:56,059 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:59:56,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:59:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1035831940, now seen corresponding path program 1 times [2023-04-01 08:59:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:59:56,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487108651] [2023-04-01 08:59:56,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:56,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:59:56,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 08:59:56,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82647501] [2023-04-01 08:59:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:59:56,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:59:56,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:59:56,081 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 08:59:56,083 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 08:59:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:59:56,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 82 conjunts are in the unsatisfiable core [2023-04-01 08:59:56,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:59:56,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 08:59:56,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 08:59:56,732 INFO L321 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2023-04-01 08:59:56,732 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2023-04-01 08:59:56,785 INFO L321 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2023-04-01 08:59:56,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 49 [2023-04-01 08:59:58,437 INFO L321 Elim1Store]: treesize reduction 111, result has 52.8 percent of original size [2023-04-01 08:59:58,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 113 treesize of output 192