/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-fpi/sqm-if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:09:10,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:09:10,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:09:10,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:09:10,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:09:10,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:09:10,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:09:10,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:09:10,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:09:10,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:09:10,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:09:10,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:09:10,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:09:10,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:09:10,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:09:10,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:09:10,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:09:10,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:09:10,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:09:10,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:09:10,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:09:10,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:09:10,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:09:10,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:09:10,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:09:10,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:09:10,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:09:10,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:09:10,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:09:10,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:09:10,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:09:10,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:09:10,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:09:10,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:09:10,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:09:10,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:09:10,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:09:10,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:09:10,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:09:10,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:09:10,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:09:10,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:09:10,296 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:09:10,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:09:10,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:09:10,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:09:10,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:09:10,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:09:10,298 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:09:10,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:09:10,298 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:09:10,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:09:10,299 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:09:10,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:09:10,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:09:10,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:09:10,300 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:09:10,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:09:10,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:09:10,300 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:09:10,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:09:10,301 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:09:10,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:09:10,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:09:10,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:09:10,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:09:10,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:09:10,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:09:10,302 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:09:10,302 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:09:10,303 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:09:10,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:09:10,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:09:10,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:09:10,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:09:10,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:09:10,304 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:09:10,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:09:10,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:09:10,304 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:09:10,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:09:10,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:09:10,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:09:10,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:09:10,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:09:10,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:09:10,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:09:10,569 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:09:10,569 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:09:10,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sqm-if.c [2023-04-01 09:09:11,707 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:09:11,866 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:09:11,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-if.c [2023-04-01 09:09:11,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5cc5bd41/8ed31f3a079a4411aafaf316d3c2697c/FLAGd3fc1d5ca [2023-04-01 09:09:11,884 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5cc5bd41/8ed31f3a079a4411aafaf316d3c2697c [2023-04-01 09:09:11,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:09:11,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:09:11,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:09:11,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:09:11,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:09:11,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:09:11" (1/1) ... [2023-04-01 09:09:11,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5420a02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:11, skipping insertion in model container [2023-04-01 09:09:11,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:09:11" (1/1) ... [2023-04-01 09:09:11,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:09:11,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:09:12,017 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2023-04-01 09:09:12,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:09:12,055 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:09:12,066 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2023-04-01 09:09:12,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:09:12,084 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:09:12,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12 WrapperNode [2023-04-01 09:09:12,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:09:12,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:09:12,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:09:12,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:09:12,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,113 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:09:12,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:09:12,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:09:12,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:09:12,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (1/1) ... [2023-04-01 09:09:12,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:09:12,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:12,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:09:12,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:09:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:09:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:09:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:09:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 09:09:12,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 09:09:12,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:09:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:09:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:09:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:09:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:09:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 09:09:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 09:09:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:09:12,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:09:12,285 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:09:12,287 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:09:12,525 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:09:12,606 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:09:12,607 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 09:09:12,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:09:12 BoogieIcfgContainer [2023-04-01 09:09:12,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:09:12,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:09:12,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:09:12,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:09:12,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:09:11" (1/3) ... [2023-04-01 09:09:12,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@def4c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:09:12, skipping insertion in model container [2023-04-01 09:09:12,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:09:12" (2/3) ... [2023-04-01 09:09:12,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@def4c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:09:12, skipping insertion in model container [2023-04-01 09:09:12,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:09:12" (3/3) ... [2023-04-01 09:09:12,617 INFO L112 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2023-04-01 09:09:12,633 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:09:12,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:09:12,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:09:12,698 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;@22e19184, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:09:12,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:09:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:09:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 09:09:12,709 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:12,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:12,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:12,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -329856190, now seen corresponding path program 1 times [2023-04-01 09:09:12,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:12,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596146840] [2023-04-01 09:09:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:12,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:12,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496345020] [2023-04-01 09:09:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:12,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:12,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:12,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:09:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:09:12,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 09:09:12,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:13,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:09:13,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:13,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596146840] [2023-04-01 09:09:13,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:13,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496345020] [2023-04-01 09:09:13,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496345020] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:09:13,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:09:13,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 09:09:13,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333465938] [2023-04-01 09:09:13,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:09:13,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 09:09:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:13,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 09:09:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:09:13,104 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:09:13,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:13,185 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-04-01 09:09:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 09:09:13,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 09:09:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:13,194 INFO L225 Difference]: With dead ends: 48 [2023-04-01 09:09:13,194 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 09:09:13,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 09:09:13,200 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:13,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:09:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 09:09:13,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-04-01 09:09:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:09:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-04-01 09:09:13,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2023-04-01 09:09:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:13,233 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-04-01 09:09:13,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:09:13,233 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-04-01 09:09:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 09:09:13,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:13,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:13,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 09:09:13,434 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 09:09:13,435 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:13,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:13,436 INFO L85 PathProgramCache]: Analyzing trace with hash 276511424, now seen corresponding path program 1 times [2023-04-01 09:09:13,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:13,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716191687] [2023-04-01 09:09:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:13,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:13,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:13,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069842462] [2023-04-01 09:09:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:13,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:13,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:13,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:13,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:09:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:09:13,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 09:09:13,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:13,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:09:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:09:13,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:13,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:13,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 09:09:14,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:14,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 09:09:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:09:14,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:14,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716191687] [2023-04-01 09:09:14,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069842462] [2023-04-01 09:09:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069842462] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824681467] [2023-04-01 09:09:14,124 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:14,125 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:14,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:14,133 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:14,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:14,318 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:15,999 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:16,061 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:16,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:16,078 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:17,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '307#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int) (|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_3| 2) 9) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (not (= v_main_~a~0.base_BEFORE_CALL_1 0)) (not (= v_main_~a~0.base_BEFORE_CALL_1 3)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_1) 0) 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| v_main_~a~0.base_BEFORE_CALL_1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_1 1)) (not (= v_main_~a~0.base_BEFORE_CALL_1 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_1 2)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:17,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:17,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:17,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2023-04-01 09:09:17,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250649938] [2023-04-01 09:09:17,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:17,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 09:09:17,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 09:09:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2023-04-01 09:09:17,608 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 13 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:09:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:17,814 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-04-01 09:09:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 09:09:17,815 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 09:09:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:17,816 INFO L225 Difference]: With dead ends: 39 [2023-04-01 09:09:17,816 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 09:09:17,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2023-04-01 09:09:17,818 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:17,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 98 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:09:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 09:09:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-01 09:09:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:09:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 09:09:17,825 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2023-04-01 09:09:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:17,825 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 09:09:17,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 09:09:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 09:09:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 09:09:17,826 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:17,826 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:17,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:18,033 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 09:09:18,034 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:18,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1073576919, now seen corresponding path program 2 times [2023-04-01 09:09:18,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:18,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480193382] [2023-04-01 09:09:18,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:18,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:18,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862529992] [2023-04-01 09:09:18,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:09:18,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:18,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:18,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:18,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:09:18,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 09:09:18,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:18,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:09:18,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:18,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:18,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:18,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480193382] [2023-04-01 09:09:18,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:18,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862529992] [2023-04-01 09:09:18,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862529992] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:18,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480048866] [2023-04-01 09:09:18,314 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:18,315 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:18,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:18,315 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:18,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:18,379 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:19,291 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:19,330 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:19,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:19,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:20,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '558#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_2 Int) (|v_old(#valid)_BEFORE_CALL_7| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int))) (|v_old(#length)_BEFORE_CALL_7| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_2 1)) (= (select |v_old(#valid)_BEFORE_CALL_7| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_7| 0) 0) (= 9 (select |v_old(#length)_BEFORE_CALL_7| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_2 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48) (= (select |v_old(#valid)_BEFORE_CALL_7| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#valid)_BEFORE_CALL_7|)) (= 2 (select |v_old(#length)_BEFORE_CALL_7| 1)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_2) 0) 1)) (not (= v_main_~a~0.base_BEFORE_CALL_2 3)) (= (select |v_old(#valid)_BEFORE_CALL_7| v_main_~a~0.base_BEFORE_CALL_2) 0) (= (select |v_old(#length)_BEFORE_CALL_7| 3) 12) (not (= (select |v_old(#memory_int)_BEFORE_CALL_7| 1) |v_old(#length)_BEFORE_CALL_7|)) (not (= v_main_~a~0.base_BEFORE_CALL_2 |#StackHeapBarrier|)) (not (= |v_old(#valid)_BEFORE_CALL_7| |v_old(#length)_BEFORE_CALL_7|)) (not (= v_main_~a~0.base_BEFORE_CALL_2 2)))) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:20,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:20,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:20,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-04-01 09:09:20,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105501943] [2023-04-01 09:09:20,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 09:09:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 09:09:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-04-01 09:09:20,559 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:20,669 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2023-04-01 09:09:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:09:20,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 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 20 [2023-04-01 09:09:20,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:20,670 INFO L225 Difference]: With dead ends: 51 [2023-04-01 09:09:20,671 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 09:09:20,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-04-01 09:09:20,672 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:20,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 60 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:09:20,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 09:09:20,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-04-01 09:09:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:09:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 09:09:20,678 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2023-04-01 09:09:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:20,679 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 09:09:20,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 09:09:20,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 09:09:20,680 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:20,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:20,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:20,885 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 09:09:20,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:20,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:20,886 INFO L85 PathProgramCache]: Analyzing trace with hash -737043390, now seen corresponding path program 3 times [2023-04-01 09:09:20,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:20,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866282966] [2023-04-01 09:09:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:20,929 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:20,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793747811] [2023-04-01 09:09:20,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:09:20,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:20,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:20,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 09:09:21,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:09:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:21,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-01 09:09:21,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:21,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:09:21,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:09:21,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:21,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:09:21,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:21,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 09:09:21,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:21,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 09:09:21,459 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 8 treesize of output 4 [2023-04-01 09:09:21,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-04-01 09:09:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:09:21,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:21,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866282966] [2023-04-01 09:09:21,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:21,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793747811] [2023-04-01 09:09:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793747811] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214068698] [2023-04-01 09:09:21,492 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:21,492 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:21,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:21,492 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:21,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:21,568 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:22,443 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:22,489 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:22,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:22,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:23,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '837#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (exists ((|v_old(#memory_int)_BEFORE_CALL_11| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_11| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_11| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_3 Int)) (and (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_3) 0) 1)) (not (= v_main_~a~0.base_BEFORE_CALL_3 1)) (not (= |v_old(#valid)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 2)) (not (= v_main_~a~0.base_BEFORE_CALL_3 3)) (= 1 (select |v_old(#valid)_BEFORE_CALL_11| 2)) (= 9 (select |v_old(#length)_BEFORE_CALL_11| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_11| v_main_~a~0.base_BEFORE_CALL_3) 0) (not (= |v_old(#length)_BEFORE_CALL_11| (select |v_old(#memory_int)_BEFORE_CALL_11| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_3 |#StackHeapBarrier|)) (= 12 (select |v_old(#length)_BEFORE_CALL_11| 3)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_11| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_3 0)) (= (select |v_old(#valid)_BEFORE_CALL_11| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_11| 1) 2) (not (= |v_old(#valid)_BEFORE_CALL_11| |v_old(#length)_BEFORE_CALL_11|)) (= (select |v_old(#valid)_BEFORE_CALL_11| 0) 0))) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:23,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:23,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:23,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2023-04-01 09:09:23,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899244642] [2023-04-01 09:09:23,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:23,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 09:09:23,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:23,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 09:09:23,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-04-01 09:09:23,700 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:23,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:23,979 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-04-01 09:09:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 09:09:23,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 09:09:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:23,980 INFO L225 Difference]: With dead ends: 48 [2023-04-01 09:09:23,980 INFO L226 Difference]: Without dead ends: 46 [2023-04-01 09:09:23,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 09:09:23,983 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:23,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 108 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:09:23,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-01 09:09:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2023-04-01 09:09:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 09:09:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 09:09:23,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2023-04-01 09:09:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:23,991 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 09:09:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 09:09:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 09:09:23,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:23,992 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:24,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:24,199 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 09:09:24,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:24,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash 944203426, now seen corresponding path program 4 times [2023-04-01 09:09:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:24,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436511272] [2023-04-01 09:09:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:24,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:24,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553901638] [2023-04-01 09:09:24,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:09:24,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:24,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:24,265 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:24,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 09:09:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:09:24,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 09:09:24,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:09:24,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:09:24,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436511272] [2023-04-01 09:09:24,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553901638] [2023-04-01 09:09:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553901638] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550800514] [2023-04-01 09:09:24,421 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:24,421 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:24,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:24,421 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:24,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:24,455 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:25,176 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:25,208 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:25,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:25,220 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:26,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1133#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((|v_old(#length)_BEFORE_CALL_15| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_15| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_15| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_4 1)) (= (select |v_old(#valid)_BEFORE_CALL_15| v_main_~a~0.base_BEFORE_CALL_4) 0) (= (select |v_old(#valid)_BEFORE_CALL_15| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_15| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_15| 0) 0) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_4) 0) 1)) (not (= |v_old(#valid)_BEFORE_CALL_15| |v_old(#length)_BEFORE_CALL_15|)) (not (= |v_old(#valid)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_4 0)) (= (select |v_old(#length)_BEFORE_CALL_15| 1) 2) (= (select |v_old(#valid)_BEFORE_CALL_15| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_4 3)) (= (select |v_old(#length)_BEFORE_CALL_15| 2) 9) (not (= v_main_~a~0.base_BEFORE_CALL_4 2)) (not (= |v_old(#length)_BEFORE_CALL_15| (select |v_old(#memory_int)_BEFORE_CALL_15| 1))) (= (select |v_old(#valid)_BEFORE_CALL_15| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_15| 1) 1) 0) (not (= v_main_~a~0.base_BEFORE_CALL_4 |#StackHeapBarrier|)))) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:26,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:26,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:26,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-04-01 09:09:26,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70205380] [2023-04-01 09:09:26,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:26,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 09:09:26,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 09:09:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2023-04-01 09:09:26,185 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:26,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:26,364 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2023-04-01 09:09:26,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:09:26,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-04-01 09:09:26,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:26,369 INFO L225 Difference]: With dead ends: 70 [2023-04-01 09:09:26,370 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 09:09:26,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:09:26,374 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:26,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 70 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 09:09:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 09:09:26,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2023-04-01 09:09:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 09:09:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-04-01 09:09:26,390 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 23 [2023-04-01 09:09:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:26,390 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-04-01 09:09:26,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-04-01 09:09:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 09:09:26,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:26,392 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:26,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:26,592 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 09:09:26,593 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:26,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:26,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1248848471, now seen corresponding path program 5 times [2023-04-01 09:09:26,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:26,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514116815] [2023-04-01 09:09:26,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:26,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:26,632 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:26,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379215832] [2023-04-01 09:09:26,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:09:26,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:26,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:26,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:26,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 09:09:26,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:09:26,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:26,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:09:26,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:26,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:26,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:26,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514116815] [2023-04-01 09:09:26,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379215832] [2023-04-01 09:09:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379215832] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:26,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [481102238] [2023-04-01 09:09:26,949 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:26,949 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:26,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:26,949 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:26,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:26,983 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:27,735 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:27,760 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:27,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:27,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:28,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1492#(and (exists ((|v_old(#length)_BEFORE_CALL_19| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_19| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_19| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_5 Int)) (and (= 9 (select |v_old(#length)_BEFORE_CALL_19| 2)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_5 0)) (= 12 (select |v_old(#length)_BEFORE_CALL_19| 3)) (not (= v_main_~a~0.base_BEFORE_CALL_5 1)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#valid)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| v_main_~a~0.base_BEFORE_CALL_5) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_19| 1) |v_old(#length)_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_19| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_5 2)) (= (select |v_old(#valid)_BEFORE_CALL_19| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_19| 1) 2) (not (= v_main_~a~0.base_BEFORE_CALL_5 |#StackHeapBarrier|)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_5) 0) 1)) (= (select |v_old(#valid)_BEFORE_CALL_19| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_5 3)) (= 1 (select |v_old(#valid)_BEFORE_CALL_19| 1)) (not (= |v_old(#valid)_BEFORE_CALL_19| |v_old(#length)_BEFORE_CALL_19|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_19| 1) 1) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:28,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:28,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:28,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-04-01 09:09:28,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027470663] [2023-04-01 09:09:28,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:28,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 09:09:28,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 09:09:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2023-04-01 09:09:28,767 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:29,087 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2023-04-01 09:09:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 09:09:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-04-01 09:09:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:29,088 INFO L225 Difference]: With dead ends: 77 [2023-04-01 09:09:29,088 INFO L226 Difference]: Without dead ends: 65 [2023-04-01 09:09:29,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 09:09:29,091 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:29,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 96 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:09:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-01 09:09:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2023-04-01 09:09:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 09:09:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-04-01 09:09:29,101 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 24 [2023-04-01 09:09:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:29,101 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-04-01 09:09:29,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-04-01 09:09:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 09:09:29,102 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:29,102 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:29,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:29,308 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 09:09:29,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:29,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2102910274, now seen corresponding path program 6 times [2023-04-01 09:09:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341437646] [2023-04-01 09:09:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:29,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:29,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:29,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813826741] [2023-04-01 09:09:29,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:09:29,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:29,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:29,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:29,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 09:09:29,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:09:29,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:29,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 09:09:29,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:29,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:09:29,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:30,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:30,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 09:09:30,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:30,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:09:30,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:09:30,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:09:30,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:30,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-04-01 09:09:30,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:30,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 09:09:30,697 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 8 treesize of output 4 [2023-04-01 09:09:30,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 318 [2023-04-01 09:09:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 09:09:30,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341437646] [2023-04-01 09:09:30,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813826741] [2023-04-01 09:09:30,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813826741] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030237887] [2023-04-01 09:09:30,764 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:30,764 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:30,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:30,764 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:30,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:30,801 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:31,501 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:31,537 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:31,544 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:31,547 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:32,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1903#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_23| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_23| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_23| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_6 Int)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 0) 48) (not (= v_main_~a~0.base_BEFORE_CALL_6 |#StackHeapBarrier|)) (= 12 (select |v_old(#length)_BEFORE_CALL_23| 3)) (= (select |v_old(#valid)_BEFORE_CALL_23| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 1) 0) (not (= 1 (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_6) 0))) (not (= v_main_~a~0.base_BEFORE_CALL_6 2)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 1) |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (not (= |v_old(#valid)_BEFORE_CALL_23| |v_old(#length)_BEFORE_CALL_23|)) (= 9 (select |v_old(#length)_BEFORE_CALL_23| 2)) (not (= v_main_~a~0.base_BEFORE_CALL_6 0)) (not (= v_main_~a~0.base_BEFORE_CALL_6 1)) (= (select |v_old(#valid)_BEFORE_CALL_23| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| v_main_~a~0.base_BEFORE_CALL_6) 0) (not (= v_main_~a~0.base_BEFORE_CALL_6 3)) (= (select |v_old(#length)_BEFORE_CALL_23| 1) 2))) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:32,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:32,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:32,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-04-01 09:09:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054084819] [2023-04-01 09:09:32,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:32,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 09:09:32,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 09:09:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 09:09:32,713 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 23 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:33,418 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2023-04-01 09:09:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 09:09:33,418 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-04-01 09:09:33,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:33,420 INFO L225 Difference]: With dead ends: 96 [2023-04-01 09:09:33,420 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 09:09:33,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 09:09:33,421 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:33,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 172 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 09:09:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 09:09:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 60. [2023-04-01 09:09:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 09:09:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2023-04-01 09:09:33,435 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 25 [2023-04-01 09:09:33,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:33,435 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2023-04-01 09:09:33,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2023-04-01 09:09:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 09:09:33,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:33,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:33,446 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 09:09:33,646 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 09:09:33,646 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:33,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash 137138764, now seen corresponding path program 1 times [2023-04-01 09:09:33,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:33,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568521677] [2023-04-01 09:09:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:33,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:33,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724522231] [2023-04-01 09:09:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:33,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:33,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:33,669 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:33,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 09:09:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:09:33,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 09:09:33,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:33,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:09:33,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:09:33,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:33,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:33,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:09:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:34,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:34,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 09:09:34,756 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (= c_main_~i~0 0))) (and (or (let ((.cse0 (+ c_main_~i~0 1))) (and (not (= .cse0 0)) (forall ((v_ArrVal_384 (Array Int Int))) (= (select (store v_ArrVal_384 (+ c_main_~a~0.offset (* (mod .cse0 4294967296) 8)) (let ((.cse1 (* (mod c_main_~i~0 4294967296) 8))) (+ (select v_ArrVal_384 (+ c_main_~a~0.offset .cse1)) (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_384) c_main_~b~0.base) (+ .cse1 c_main_~b~0.offset)) 2))) (+ c_main_~a~0.offset 8)) 4)))) .cse2) (or (not .cse2) (= (select (select (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) c_main_~a~0.offset 1)) c_main_~b~0.base) c_main_~b~0.offset) 1)))) is different from false [2023-04-01 09:09:34,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:34,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2023-04-01 09:09:34,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:34,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 09:09:35,007 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 135 treesize of output 122 [2023-04-01 09:09:35,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:09:35,042 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 8 treesize of output 4 [2023-04-01 09:09:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 09:09:35,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568521677] [2023-04-01 09:09:35,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724522231] [2023-04-01 09:09:35,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724522231] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306364440] [2023-04-01 09:09:35,074 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:09:35,074 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:35,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:35,074 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:35,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:35,113 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:36,436 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 93 for LOIs [2023-04-01 09:09:36,520 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:36,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:36,530 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:38,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2380#(and (exists ((|v_main_#t~mem13_BEFORE_CALL_19| Int) (|v_old(#length)_BEFORE_CALL_35| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_35| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_35| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_21 Int) (v_main_~a~0.base_BEFORE_CALL_17 Int)) (and (not (= |v_old(#length)_BEFORE_CALL_35| (select |v_old(#memory_int)_BEFORE_CALL_35| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_17 2)) (not (= (+ (* v_main_~i~0_BEFORE_CALL_21 v_main_~i~0_BEFORE_CALL_21) (* v_main_~i~0_BEFORE_CALL_21 2) 1) |v_main_#t~mem13_BEFORE_CALL_19|)) (= (select |v_old(#valid)_BEFORE_CALL_35| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_17 3)) (or (and (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_17) (* (mod v_main_~i~0_BEFORE_CALL_21 4294967296) 8)) |v_main_#t~mem13_BEFORE_CALL_19|) (<= (mod v_main_~i~0_BEFORE_CALL_21 4294967296) 2147483647)) (and (= |v_main_#t~mem13_BEFORE_CALL_19| (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_17) (+ (* (mod v_main_~i~0_BEFORE_CALL_21 4294967296) 8) (- 34359738368)))) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_21 4294967296)))) (= (select |v_old(#length)_BEFORE_CALL_35| 3) 12) (not (= |v_old(#valid)_BEFORE_CALL_35| |v_old(#length)_BEFORE_CALL_35|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_35| 1) 0)) (= 9 (select |v_old(#length)_BEFORE_CALL_35| 2)) (not (= v_main_~a~0.base_BEFORE_CALL_17 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_17 0)) (< v_main_~i~0_BEFORE_CALL_21 ~N~0) (not (= v_main_~a~0.base_BEFORE_CALL_17 1)) (= 1 (select |v_old(#valid)_BEFORE_CALL_35| 1)) (= (select |v_old(#valid)_BEFORE_CALL_35| v_main_~a~0.base_BEFORE_CALL_17) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_35| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_35| 0) 0) (= (select |v_old(#valid)_BEFORE_CALL_35| 3) 1) (= 2 (select |v_old(#length)_BEFORE_CALL_35| 1)) (not (= |v_old(#valid)_BEFORE_CALL_35| (select |v_old(#memory_int)_BEFORE_CALL_35| 1))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:38,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:38,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:38,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-04-01 09:09:38,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572175127] [2023-04-01 09:09:38,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:38,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 09:09:38,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 09:09:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1436, Unknown=3, NotChecked=76, Total=1640 [2023-04-01 09:09:38,039 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:09:38,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:38,944 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2023-04-01 09:09:38,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 09:09:38,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-04-01 09:09:38,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:38,945 INFO L225 Difference]: With dead ends: 93 [2023-04-01 09:09:38,945 INFO L226 Difference]: Without dead ends: 81 [2023-04-01 09:09:38,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=233, Invalid=2218, Unknown=3, NotChecked=96, Total=2550 [2023-04-01 09:09:38,947 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:38,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 209 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 280 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2023-04-01 09:09:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-01 09:09:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2023-04-01 09:09:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 58 states have internal predecessors, (65), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 09:09:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2023-04-01 09:09:38,963 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 28 [2023-04-01 09:09:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:38,963 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2023-04-01 09:09:38,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:09:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2023-04-01 09:09:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 09:09:38,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:38,964 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:38,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:39,172 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 09:09:39,173 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:39,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1871586814, now seen corresponding path program 7 times [2023-04-01 09:09:39,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:39,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958134010] [2023-04-01 09:09:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:39,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:39,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:39,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752202192] [2023-04-01 09:09:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 09:09:39,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:39,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:39,242 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:39,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 09:09:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:09:39,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 09:09:39,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:09:39,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:09:39,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:39,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958134010] [2023-04-01 09:09:39,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:39,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752202192] [2023-04-01 09:09:39,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752202192] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:39,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103785561] [2023-04-01 09:09:39,499 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:39,499 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:39,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:39,500 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:39,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:39,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:40,190 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:40,217 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:40,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:40,227 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:41,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2879#(and (exists ((v_main_~a~0.base_BEFORE_CALL_20 Int) (|v_old(#length)_BEFORE_CALL_41| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_41| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_41| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_20 3)) (= (select |v_old(#valid)_BEFORE_CALL_41| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_20 |#StackHeapBarrier|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_41| 1) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_41| 1) |v_old(#length)_BEFORE_CALL_41|)) (= (select |v_old(#valid)_BEFORE_CALL_41| v_main_~a~0.base_BEFORE_CALL_20) 0) (= 2 (select |v_old(#length)_BEFORE_CALL_41| 1)) (= 12 (select |v_old(#length)_BEFORE_CALL_41| 3)) (not (= v_main_~a~0.base_BEFORE_CALL_20 1)) (not (= |v_old(#valid)_BEFORE_CALL_41| |v_old(#length)_BEFORE_CALL_41|)) (= (select |v_old(#valid)_BEFORE_CALL_41| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_20 2)) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_20) 0) 1)) (= (select |v_old(#valid)_BEFORE_CALL_41| 0) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_41| 1) |v_old(#valid)_BEFORE_CALL_41|)) (not (= v_main_~a~0.base_BEFORE_CALL_20 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_41| 1) 1) 0) (= 9 (select |v_old(#length)_BEFORE_CALL_41| 2)) (= (select |v_old(#valid)_BEFORE_CALL_41| 3) 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:41,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:41,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:41,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2023-04-01 09:09:41,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233068920] [2023-04-01 09:09:41,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:41,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 09:09:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 09:09:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2023-04-01 09:09:41,265 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:41,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:41,660 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2023-04-01 09:09:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 09:09:41,661 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 29 [2023-04-01 09:09:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:41,662 INFO L225 Difference]: With dead ends: 131 [2023-04-01 09:09:41,662 INFO L226 Difference]: Without dead ends: 110 [2023-04-01 09:09:41,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 09:09:41,663 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:41,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 92 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:09:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-04-01 09:09:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2023-04-01 09:09:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.203125) internal successors, (77), 68 states have internal predecessors, (77), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 09:09:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2023-04-01 09:09:41,684 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 29 [2023-04-01 09:09:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:41,685 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2023-04-01 09:09:41,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2023-04-01 09:09:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 09:09:41,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:41,686 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:41,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:41,891 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 09:09:41,892 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:41,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash -637714516, now seen corresponding path program 2 times [2023-04-01 09:09:41,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:41,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812892776] [2023-04-01 09:09:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:41,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:41,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:41,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034796901] [2023-04-01 09:09:41,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:09:41,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:41,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:41,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:41,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 09:09:42,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 09:09:42,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:42,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 09:09:42,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:09:42,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 09:09:42,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:42,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812892776] [2023-04-01 09:09:42,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:42,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034796901] [2023-04-01 09:09:42,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034796901] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:42,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489120076] [2023-04-01 09:09:42,192 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:09:42,192 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:42,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:42,193 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:42,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:42,220 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:43,445 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 93 for LOIs [2023-04-01 09:09:43,501 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:43,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:43,509 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:44,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3468#(and (exists ((|v_old(#valid)_BEFORE_CALL_53| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_33 Int) (|v_main_#t~mem13_BEFORE_CALL_31| Int) (v_main_~a~0.base_BEFORE_CALL_29 Int) (|v_old(#length)_BEFORE_CALL_53| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_53| (Array Int (Array Int Int)))) (and (not (= v_main_~a~0.base_BEFORE_CALL_29 3)) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_33 4294967296) 2147483647) (= |v_main_#t~mem13_BEFORE_CALL_31| (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_29) (* 8 (mod v_main_~i~0_BEFORE_CALL_33 4294967296))))) (and (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_29) (+ (* 8 (mod v_main_~i~0_BEFORE_CALL_33 4294967296)) (- 34359738368))) |v_main_#t~mem13_BEFORE_CALL_31|) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_33 4294967296)))) (= 9 (select |v_old(#length)_BEFORE_CALL_53| 2)) (= (select |v_old(#valid)_BEFORE_CALL_53| 3) 1) (not (= v_main_~a~0.base_BEFORE_CALL_29 |#StackHeapBarrier|)) (not (= v_main_~a~0.base_BEFORE_CALL_29 1)) (= (select |v_old(#length)_BEFORE_CALL_53| 3) 12) (= (select |v_old(#valid)_BEFORE_CALL_53| v_main_~a~0.base_BEFORE_CALL_29) 0) (= (select |v_old(#valid)_BEFORE_CALL_53| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_53| 1) 1) 0) (not (= |v_old(#valid)_BEFORE_CALL_53| (select |v_old(#memory_int)_BEFORE_CALL_53| 1))) (< v_main_~i~0_BEFORE_CALL_33 ~N~0) (= (select |v_old(#valid)_BEFORE_CALL_53| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_53| 1) 1) (not (= (+ (* v_main_~i~0_BEFORE_CALL_33 v_main_~i~0_BEFORE_CALL_33) (* v_main_~i~0_BEFORE_CALL_33 2) 1) |v_main_#t~mem13_BEFORE_CALL_31|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_53| 1) 0) 48) (not (= |v_old(#valid)_BEFORE_CALL_53| |v_old(#length)_BEFORE_CALL_53|)) (= 2 (select |v_old(#length)_BEFORE_CALL_53| 1)) (not (= v_main_~a~0.base_BEFORE_CALL_29 0)) (not (= v_main_~a~0.base_BEFORE_CALL_29 2)) (not (= |v_old(#length)_BEFORE_CALL_53| (select |v_old(#memory_int)_BEFORE_CALL_53| 1))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:44,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:44,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:44,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-04-01 09:09:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041667663] [2023-04-01 09:09:44,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 09:09:44,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 09:09:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=826, Unknown=2, NotChecked=0, Total=930 [2023-04-01 09:09:44,637 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:09:45,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:45,032 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2023-04-01 09:09:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 09:09:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-04-01 09:09:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:45,033 INFO L225 Difference]: With dead ends: 110 [2023-04-01 09:09:45,033 INFO L226 Difference]: Without dead ends: 90 [2023-04-01 09:09:45,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1361, Unknown=2, NotChecked=0, Total=1560 [2023-04-01 09:09:45,035 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:45,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 115 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 09:09:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-04-01 09:09:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2023-04-01 09:09:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.152542372881356) internal successors, (68), 61 states have internal predecessors, (68), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 09:09:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2023-04-01 09:09:45,049 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 30 [2023-04-01 09:09:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:45,050 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2023-04-01 09:09:45,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 09:09:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2023-04-01 09:09:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 09:09:45,051 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:45,051 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:45,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:45,257 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 09:09:45,258 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:45,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:45,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1682701833, now seen corresponding path program 8 times [2023-04-01 09:09:45,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:45,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834001388] [2023-04-01 09:09:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:45,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:45,287 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:45,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809597853] [2023-04-01 09:09:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 09:09:45,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:45,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:45,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 09:09:46,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 09:09:46,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:46,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 09:09:46,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:46,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:47,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834001388] [2023-04-01 09:09:47,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809597853] [2023-04-01 09:09:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809597853] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:47,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76068901] [2023-04-01 09:09:47,113 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 09:09:47,114 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:47,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:47,114 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:47,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:47,148 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:47,762 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2023-04-01 09:09:47,788 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:47,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:47,795 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:48,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4016#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (< 0 ~N~0) (exists ((|v_old(#length)_BEFORE_CALL_59| (Array Int Int)) (v_main_~a~0.base_BEFORE_CALL_32 Int) (|v_old(#memory_int)_BEFORE_CALL_59| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_59| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_32 0)) (not (= |v_old(#valid)_BEFORE_CALL_59| (select |v_old(#memory_int)_BEFORE_CALL_59| 1))) (not (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_32) 0) 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_59| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_59| 1) 1) (not (= v_main_~a~0.base_BEFORE_CALL_32 1)) (= (select |v_old(#valid)_BEFORE_CALL_59| v_main_~a~0.base_BEFORE_CALL_32) 0) (= (select |v_old(#length)_BEFORE_CALL_59| 3) 12) (not (= v_main_~a~0.base_BEFORE_CALL_32 3)) (not (= |v_old(#valid)_BEFORE_CALL_59| |v_old(#length)_BEFORE_CALL_59|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 0) 48) (not (= |v_old(#length)_BEFORE_CALL_59| (select |v_old(#memory_int)_BEFORE_CALL_59| 1))) (= (select |v_old(#valid)_BEFORE_CALL_59| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_59| 2) 9) (not (= v_main_~a~0.base_BEFORE_CALL_32 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_59| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_32 2)) (= (select |v_old(#valid)_BEFORE_CALL_59| 3) 1))) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:48,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:48,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:48,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2023-04-01 09:09:48,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609564639] [2023-04-01 09:09:48,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:48,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 09:09:48,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:48,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 09:09:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 09:09:48,863 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:09:49,764 INFO L93 Difference]: Finished difference Result 199 states and 250 transitions. [2023-04-01 09:09:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 09:09:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 30 [2023-04-01 09:09:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:09:49,766 INFO L225 Difference]: With dead ends: 199 [2023-04-01 09:09:49,766 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:09:49,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=794, Invalid=4176, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 09:09:49,769 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:09:49,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 106 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:09:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:09:49,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2023-04-01 09:09:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 95 states have internal predecessors, (109), 17 states have call successors, (17), 8 states have call predecessors, (17), 6 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 09:09:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2023-04-01 09:09:49,810 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 30 [2023-04-01 09:09:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:09:49,811 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2023-04-01 09:09:49,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:09:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2023-04-01 09:09:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 09:09:49,813 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:09:49,813 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:09:49,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 09:09:50,023 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 09:09:50,023 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:09:50,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:09:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1333055156, now seen corresponding path program 3 times [2023-04-01 09:09:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:09:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174869312] [2023-04-01 09:09:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:09:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:09:50,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:09:50,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287897766] [2023-04-01 09:09:50,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:09:50,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:09:50,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:09:50,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:09:50,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 09:09:50,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 09:09:50,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 09:09:50,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 65 conjunts are in the unsatisfiable core [2023-04-01 09:09:50,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:09:50,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 09:09:50,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 09:09:50,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:50,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:50,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:50,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 09:09:50,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 09:09:50,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 09:09:50,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 09:09:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:09:50,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:09:51,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 09:09:52,269 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_main_~i~0 0))) (and (or .cse0 (let ((.cse2 (+ c_main_~i~0 3))) (and (forall ((v_ArrVal_763 Int) (v_ArrVal_756 (Array Int Int)) (v_ArrVal_765 Int)) (= (select (store (store (store v_ArrVal_756 (+ c_main_~a~0.offset (* (mod (+ c_main_~i~0 1) 4294967296) 8)) (let ((.cse1 (* (mod c_main_~i~0 4294967296) 8))) (+ 2 (select v_ArrVal_756 (+ c_main_~a~0.offset .cse1)) (select (select (store |c_#memory_int| c_main_~a~0.base v_ArrVal_756) c_main_~b~0.base) (+ .cse1 c_main_~b~0.offset))))) (+ (* (mod (+ c_main_~i~0 2) 4294967296) 8) c_main_~a~0.offset) v_ArrVal_763) (+ (* 8 (mod .cse2 4294967296)) c_main_~a~0.offset) v_ArrVal_765) (+ c_main_~a~0.offset 8)) 4)) (not (= .cse2 0))))) (or (not .cse0) (= (select (select (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) c_main_~a~0.offset 1)) c_main_~b~0.base) c_main_~b~0.offset) 1)))) is different from false [2023-04-01 09:09:52,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:52,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2023-04-01 09:09:53,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:53,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2023-04-01 09:09:53,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:53,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2023-04-01 09:09:53,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 09:09:53,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 09:09:53,582 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 2519 treesize of output 2494 [2023-04-01 09:09:53,623 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 8 treesize of output 4 [2023-04-01 09:09:53,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 09:09:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-04-01 09:09:53,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:09:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174869312] [2023-04-01 09:09:53,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 09:09:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287897766] [2023-04-01 09:09:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287897766] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:09:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756335434] [2023-04-01 09:09:53,738 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 09:09:53,738 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:09:53,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:09:53,738 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:09:53,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:09:53,763 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2023-04-01 09:09:54,847 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 93 for LOIs [2023-04-01 09:09:54,923 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 58 for LOIs [2023-04-01 09:09:54,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 09:09:54,932 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 09:09:56,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4855#(and (exists ((v_main_~a~0.base_BEFORE_CALL_43 Int) (v_main_~i~0_BEFORE_CALL_48 Int) (|v_main_#t~mem13_BEFORE_CALL_45| Int) (|v_old(#length)_BEFORE_CALL_71| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_71| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_71| (Array Int Int))) (and (not (= v_main_~a~0.base_BEFORE_CALL_43 0)) (= (select |v_old(#valid)_BEFORE_CALL_71| 2) 1) (not (= v_main_~a~0.base_BEFORE_CALL_43 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_71| 1)) (not (= |v_old(#valid)_BEFORE_CALL_71| |v_old(#length)_BEFORE_CALL_71|)) (< v_main_~i~0_BEFORE_CALL_48 ~N~0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_71| 1) |v_old(#length)_BEFORE_CALL_71|)) (= 9 (select |v_old(#length)_BEFORE_CALL_71| 2)) (not (= |v_old(#valid)_BEFORE_CALL_71| (select |v_old(#memory_int)_BEFORE_CALL_71| 1))) (not (= v_main_~a~0.base_BEFORE_CALL_43 3)) (not (= |v_main_#t~mem13_BEFORE_CALL_45| (+ (* v_main_~i~0_BEFORE_CALL_48 v_main_~i~0_BEFORE_CALL_48) (* v_main_~i~0_BEFORE_CALL_48 2) 1))) (not (= v_main_~a~0.base_BEFORE_CALL_43 2)) (or (and (<= (mod v_main_~i~0_BEFORE_CALL_48 4294967296) 2147483647) (= |v_main_#t~mem13_BEFORE_CALL_45| (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_43) (* (mod v_main_~i~0_BEFORE_CALL_48 4294967296) 8)))) (and (= |v_main_#t~mem13_BEFORE_CALL_45| (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_43) (+ (* (mod v_main_~i~0_BEFORE_CALL_48 4294967296) 8) (- 34359738368)))) (< 2147483647 (mod v_main_~i~0_BEFORE_CALL_48 4294967296)))) (= (select |v_old(#valid)_BEFORE_CALL_71| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_71| 1) 1) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_71| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_71| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_71| 0) 0) (not (= v_main_~a~0.base_BEFORE_CALL_43 |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_71| v_main_~a~0.base_BEFORE_CALL_43) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_71| 3)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= ~N~0 0)) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 09:09:56,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 09:09:56,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 09:09:56,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2023-04-01 09:09:56,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978157818] [2023-04-01 09:09:56,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 09:09:56,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 09:09:56,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:09:56,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 09:09:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2267, Unknown=5, NotChecked=96, Total=2550 [2023-04-01 09:09:56,703 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:10:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:10:00,675 INFO L93 Difference]: Finished difference Result 199 states and 240 transitions. [2023-04-01 09:10:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 09:10:00,676 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2023-04-01 09:10:00,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:10:00,677 INFO L225 Difference]: With dead ends: 199 [2023-04-01 09:10:00,677 INFO L226 Difference]: Without dead ends: 197 [2023-04-01 09:10:00,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=497, Invalid=4332, Unknown=5, NotChecked=136, Total=4970 [2023-04-01 09:10:00,679 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:10:00,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 242 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 576 Invalid, 0 Unknown, 70 Unchecked, 1.2s Time] [2023-04-01 09:10:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-04-01 09:10:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 162. [2023-04-01 09:10:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 122 states have (on average 1.1557377049180328) internal successors, (141), 130 states have internal predecessors, (141), 30 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (26), 20 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 09:10:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2023-04-01 09:10:00,731 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 32 [2023-04-01 09:10:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:10:00,731 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2023-04-01 09:10:00,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 09:10:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2023-04-01 09:10:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 09:10:00,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:10:00,732 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:10:00,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 09:10:00,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 09:10:00,934 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:10:00,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:10:00,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1672916802, now seen corresponding path program 9 times [2023-04-01 09:10:00,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:10:00,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832643340] [2023-04-01 09:10:00,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:10:00,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:10:00,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 09:10:00,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650423022] [2023-04-01 09:10:00,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 09:10:00,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:10:00,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:10:00,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:10:00,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process