/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 OctagonDomain -i ../sv-benchmarks/c/array-tiling/pnr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:47:17,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:47:17,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:47:17,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:47:17,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:47:17,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:47:17,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:47:17,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:47:17,204 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:47:17,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:47:17,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:47:17,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:47:17,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:47:17,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:47:17,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:47:17,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:47:17,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:47:17,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:47:17,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:47:17,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:47:17,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:47:17,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:47:17,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:47:17,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:47:17,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:47:17,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:47:17,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:47:17,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:47:17,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:47:17,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:47:17,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:47:17,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:47:17,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:47:17,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:47:17,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:47:17,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:47:17,244 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 02:47:17,270 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:47:17,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:47:17,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:47:17,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:47:17,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:47:17,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:47:17,272 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:47:17,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:47:17,273 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:47:17,273 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:47:17,274 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:47:17,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:47:17,274 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:47:17,274 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:47:17,274 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:47:17,274 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:47:17,275 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:47:17,275 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:47:17,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:47:17,275 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:47:17,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:47:17,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:47:17,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:47:17,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:47:17,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:47:17,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:47:17,276 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:47:17,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:47:17,277 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:47:17,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:47:17,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:47:17,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:47:17,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:47:17,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:47:17,278 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:47:17,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:47:17,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:47:17,278 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:47:17,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:47:17,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:47:17,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:47:17,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:47:17,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:47:17,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:47:17,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:47:17,553 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:47:17,554 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:47:17,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr4.c [2023-04-01 02:47:18,624 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:47:18,776 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:47:18,776 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c [2023-04-01 02:47:18,781 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e496e996b/1676267cd6234456890585b5d63408dd/FLAG070ea73df [2023-04-01 02:47:18,797 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e496e996b/1676267cd6234456890585b5d63408dd [2023-04-01 02:47:18,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:47:18,801 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:47:18,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:47:18,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:47:18,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:47:18,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:47:18" (1/1) ... [2023-04-01 02:47:18,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60759841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:18, skipping insertion in model container [2023-04-01 02:47:18,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:47:18" (1/1) ... [2023-04-01 02:47:18,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:47:18,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:47:18,936 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-tiling/pnr4.c[395,408] [2023-04-01 02:47:18,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:47:18,982 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:47:18,993 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-tiling/pnr4.c[395,408] [2023-04-01 02:47:19,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:47:19,017 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:47:19,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19 WrapperNode [2023-04-01 02:47:19,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:47:19,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:47:19,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:47:19,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:47:19,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:47:19,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:47:19,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:47:19,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:47:19,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (1/1) ... [2023-04-01 02:47:19,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:47:19,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:19,077 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 02:47:19,090 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 02:47:19,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:47:19,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:47:19,118 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:47:19,119 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:47:19,119 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:47:19,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2023-04-01 02:47:19,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 02:47:19,120 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2023-04-01 02:47:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:47:19,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 02:47:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:47:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:47:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:47:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:47:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:47:19,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:47:19,206 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:47:19,208 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:47:19,451 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:47:19,579 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:47:19,580 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:47:19,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:47:19 BoogieIcfgContainer [2023-04-01 02:47:19,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:47:19,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:47:19,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:47:19,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:47:19,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:47:18" (1/3) ... [2023-04-01 02:47:19,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d894381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:47:19, skipping insertion in model container [2023-04-01 02:47:19,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:19" (2/3) ... [2023-04-01 02:47:19,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d894381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:47:19, skipping insertion in model container [2023-04-01 02:47:19,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:47:19" (3/3) ... [2023-04-01 02:47:19,599 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr4.c [2023-04-01 02:47:19,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:47:19,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:47:19,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:47:19,677 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;@6e1584c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:47:19,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:47:19,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 02:47:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:47:19,688 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:19,689 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 02:47:19,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:19,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -488773988, now seen corresponding path program 1 times [2023-04-01 02:47:19,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:19,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118216245] [2023-04-01 02:47:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:19,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:20,257 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 02:47:20,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:20,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118216245] [2023-04-01 02:47:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118216245] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:47:20,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:47:20,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 02:47:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532259106] [2023-04-01 02:47:20,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:47:20,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 02:47:20,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:20,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 02:47:20,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:47:20,300 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:47:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:20,469 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-04-01 02:47:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:47:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 02:47:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:20,477 INFO L225 Difference]: With dead ends: 68 [2023-04-01 02:47:20,477 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 02:47:20,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:47:20,482 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:20,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 55 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:47:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 02:47:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-04-01 02:47:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:47:20,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-04-01 02:47:20,528 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2023-04-01 02:47:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:20,528 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-04-01 02:47:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:47:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-04-01 02:47:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 02:47:20,532 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:20,532 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:20,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:47:20,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:20,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:20,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1970260755, now seen corresponding path program 1 times [2023-04-01 02:47:20,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:20,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564280442] [2023-04-01 02:47:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:20,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:47:21,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:21,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564280442] [2023-04-01 02:47:21,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564280442] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:21,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115053078] [2023-04-01 02:47:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:21,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:21,845 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 02:47:21,850 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 02:47:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:21,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 02:47:21,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:22,233 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 02:47:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:47:22,252 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 1 [2023-04-01 02:47:22,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-04-01 02:47:22,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:47:22,389 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 35 treesize of output 21 [2023-04-01 02:47:22,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-04-01 02:47:22,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:22,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 75 [2023-04-01 02:47:22,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-04-01 02:47:22,554 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 47 treesize of output 31 [2023-04-01 02:47:22,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2023-04-01 02:47:22,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:22,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 75 [2023-04-01 02:47:22,627 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 38 treesize of output 24 [2023-04-01 02:47:22,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-04-01 02:47:22,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2023-04-01 02:47:22,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:22,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 16 [2023-04-01 02:47:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:47:22,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:23,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:23,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 02:47:23,026 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 49 treesize of output 36 [2023-04-01 02:47:23,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:23,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-04-01 02:47:23,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:23,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2023-04-01 02:47:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:47:23,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115053078] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:23,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100656203] [2023-04-01 02:47:23,244 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 02:47:23,244 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:23,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:23,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:23,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:23,346 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:47:25,490 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-04-01 02:47:25,504 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 39 for LOIs [2023-04-01 02:47:25,509 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:47:25,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:47:25,518 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:47:27,848 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '415#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (<= 2 ~SIZE~0) (exists ((v_main_~a~0.base_BEFORE_CALL_33 Int)) (and (<= (+ v_main_~a~0.base_BEFORE_CALL_33 1) |#StackHeapBarrier|) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_33) 0) 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:47:27,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:47:27,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:47:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 12] total 31 [2023-04-01 02:47:27,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148837501] [2023-04-01 02:47:27,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:47:27,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 02:47:27,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 02:47:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2866, Unknown=7, NotChecked=0, Total=3192 [2023-04-01 02:47:27,855 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 31 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 24 states have internal predecessors, (41), 13 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2023-04-01 02:47:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:28,620 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-04-01 02:47:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 02:47:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 24 states have internal predecessors, (41), 13 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) Word has length 34 [2023-04-01 02:47:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:28,622 INFO L225 Difference]: With dead ends: 52 [2023-04-01 02:47:28,622 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 02:47:28,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=552, Invalid=4271, Unknown=7, NotChecked=0, Total=4830 [2023-04-01 02:47:28,625 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 109 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:28,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 211 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:47:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 02:47:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2023-04-01 02:47:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 02:47:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-04-01 02:47:28,648 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2023-04-01 02:47:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:28,648 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-04-01 02:47:28,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 24 states have internal predecessors, (41), 13 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2023-04-01 02:47:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-04-01 02:47:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 02:47:28,650 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:28,650 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:28,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:47:28,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:28,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:28,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:28,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1993370445, now seen corresponding path program 1 times [2023-04-01 02:47:28,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:28,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726322033] [2023-04-01 02:47:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:28,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 02:47:29,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726322033] [2023-04-01 02:47:29,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726322033] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131447266] [2023-04-01 02:47:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:29,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:29,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:29,274 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 02:47:29,298 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 02:47:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:29,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 02:47:29,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:29,525 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 02:47:29,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:47:29,531 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 1 [2023-04-01 02:47:29,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-04-01 02:47:29,582 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 27 treesize of output 15 [2023-04-01 02:47:29,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:47:29,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-04-01 02:47:29,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:29,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2023-04-01 02:47:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 02:47:29,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:29,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:29,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 02:47:29,862 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 53 treesize of output 40 [2023-04-01 02:47:29,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:29,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 37 [2023-04-01 02:47:29,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:29,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-04-01 02:47:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 02:47:30,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131447266] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:30,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1880604502] [2023-04-01 02:47:30,069 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 02:47:30,069 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:30,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:30,070 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:30,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:30,100 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:47:31,827 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:47:31,865 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 39 for LOIs [2023-04-01 02:47:31,870 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:47:31,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:47:31,882 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:47:34,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '923#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (exists ((v_main_~a~0.base_BEFORE_CALL_77 Int) (v_main_~i~0_BEFORE_CALL_76 Int)) (and (<= 1 (+ v_main_~i~0_BEFORE_CALL_76 |#StackHeapBarrier|)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_77) (* v_main_~i~0_BEFORE_CALL_76 4)) 0) (<= ~SIZE~0 (+ v_main_~i~0_BEFORE_CALL_76 99999)) (<= (+ v_main_~a~0.base_BEFORE_CALL_77 1) |#StackHeapBarrier|) (< v_main_~i~0_BEFORE_CALL_76 ~SIZE~0) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_76)) (<= 0 v_main_~i~0_BEFORE_CALL_76))) (= |#NULL.base| 0))' at error location [2023-04-01 02:47:34,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:47:34,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:47:34,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 32 [2023-04-01 02:47:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422818815] [2023-04-01 02:47:34,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:47:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 02:47:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 02:47:34,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3190, Unknown=10, NotChecked=0, Total=3540 [2023-04-01 02:47:34,050 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 17 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) [2023-04-01 02:47:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:35,102 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2023-04-01 02:47:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 02:47:35,103 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 17 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) Word has length 48 [2023-04-01 02:47:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:35,105 INFO L225 Difference]: With dead ends: 89 [2023-04-01 02:47:35,105 INFO L226 Difference]: Without dead ends: 87 [2023-04-01 02:47:35,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=628, Invalid=5214, Unknown=10, NotChecked=0, Total=5852 [2023-04-01 02:47:35,107 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:35,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 291 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 02:47:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-01 02:47:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2023-04-01 02:47:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 02:47:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-04-01 02:47:35,122 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 48 [2023-04-01 02:47:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:35,122 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-04-01 02:47:35,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 17 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (21), 16 states have call predecessors, (21), 15 states have call successors, (21) [2023-04-01 02:47:35,123 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-04-01 02:47:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 02:47:35,124 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:35,124 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:35,135 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 02:47:35,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:47:35,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:35,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash -306054739, now seen corresponding path program 2 times [2023-04-01 02:47:35,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:35,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315549235] [2023-04-01 02:47:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:35,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 02:47:35,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315549235] [2023-04-01 02:47:35,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315549235] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:35,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378309199] [2023-04-01 02:47:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:47:35,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:35,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:35,622 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 02:47:35,649 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 02:47:35,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 02:47:35,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:47:35,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 02:47:35,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 02:47:36,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 02:47:36,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378309199] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:36,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335515767] [2023-04-01 02:47:36,243 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 02:47:36,243 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:36,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:36,244 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:36,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:36,279 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:47:37,754 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:47:37,781 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 39 for LOIs [2023-04-01 02:47:37,786 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:47:37,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:47:37,794 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:47:39,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1594#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (exists ((v_main_~i~0_BEFORE_CALL_129 Int) (v_main_~a~0.base_BEFORE_CALL_117 Int)) (and (<= 0 v_main_~i~0_BEFORE_CALL_129) (<= (+ v_main_~a~0.base_BEFORE_CALL_117 1) |#StackHeapBarrier|) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_117) (* v_main_~i~0_BEFORE_CALL_129 4)) 0) (< v_main_~i~0_BEFORE_CALL_129 ~SIZE~0) (<= ~SIZE~0 (+ 99999 v_main_~i~0_BEFORE_CALL_129)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_129 |#StackHeapBarrier|)) (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_129)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:47:39,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:47:39,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:47:39,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 28 [2023-04-01 02:47:39,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652726373] [2023-04-01 02:47:39,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:47:39,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 02:47:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 02:47:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=2700, Unknown=7, NotChecked=0, Total=3080 [2023-04-01 02:47:39,763 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 20 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) [2023-04-01 02:47:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:40,108 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2023-04-01 02:47:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 02:47:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 20 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) Word has length 62 [2023-04-01 02:47:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:40,111 INFO L225 Difference]: With dead ends: 98 [2023-04-01 02:47:40,111 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 02:47:40,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=479, Invalid=3296, Unknown=7, NotChecked=0, Total=3782 [2023-04-01 02:47:40,113 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:40,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 65 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:47:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 02:47:40,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2023-04-01 02:47:40,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 02:47:40,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-04-01 02:47:40,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 62 [2023-04-01 02:47:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:40,128 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-04-01 02:47:40,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 20 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (28), 19 states have call predecessors, (28), 19 states have call successors, (28) [2023-04-01 02:47:40,128 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-04-01 02:47:40,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 02:47:40,130 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:40,130 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:40,136 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 02:47:40,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:40,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:40,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 994720508, now seen corresponding path program 3 times [2023-04-01 02:47:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:40,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034236069] [2023-04-01 02:47:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:40,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 02:47:41,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034236069] [2023-04-01 02:47:41,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034236069] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:41,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853816222] [2023-04-01 02:47:41,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:47:41,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:41,577 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 02:47:41,580 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 02:47:41,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:47:41,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:47:41,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 78 conjunts are in the unsatisfiable core [2023-04-01 02:47:41,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:41,989 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 02:47:41,995 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 02:47:42,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2023-04-01 02:47:42,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-04-01 02:47:42,103 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 27 treesize of output 15 [2023-04-01 02:47:42,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 02:47:42,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:42,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 75 [2023-04-01 02:47:42,200 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 38 treesize of output 24 [2023-04-01 02:47:42,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-04-01 02:47:42,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2023-04-01 02:47:42,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:42,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 93 [2023-04-01 02:47:42,351 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 57 treesize of output 39 [2023-04-01 02:47:42,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2023-04-01 02:47:42,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-04-01 02:47:42,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:42,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 20 [2023-04-01 02:47:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 02:47:42,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:43,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:43,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2023-04-01 02:47:43,303 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 53 treesize of output 40 [2023-04-01 02:47:43,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:43,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 37 [2023-04-01 02:47:43,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:43,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 39 [2023-04-01 02:47:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-04-01 02:47:43,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853816222] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:43,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554226845] [2023-04-01 02:47:43,605 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 02:47:43,605 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:43,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:43,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:43,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:43,644 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:47:45,159 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:47:45,181 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 39 for LOIs [2023-04-01 02:47:45,185 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:47:45,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:47:45,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:47:47,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2391#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~SIZE~0 99999) (exists ((v_main_~i~0_BEFORE_CALL_187 Int) (v_main_~a~0.base_BEFORE_CALL_171 Int)) (and (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_187)) (< v_main_~i~0_BEFORE_CALL_187 ~SIZE~0) (<= 0 v_main_~i~0_BEFORE_CALL_187) (<= (+ v_main_~a~0.base_BEFORE_CALL_171 1) |#StackHeapBarrier|) (<= ~SIZE~0 (+ 99999 v_main_~i~0_BEFORE_CALL_187)) (<= 1 (+ v_main_~i~0_BEFORE_CALL_187 |#StackHeapBarrier|)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_171) (* v_main_~i~0_BEFORE_CALL_187 4)) 0))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:47:47,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:47:47,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:47:47,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 18] total 48 [2023-04-01 02:47:47,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572307774] [2023-04-01 02:47:47,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:47:47,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-01 02:47:47,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-01 02:47:47,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=5149, Unknown=12, NotChecked=0, Total=5700 [2023-04-01 02:47:47,610 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 48 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 29 states have call successors, (43), 5 states have call predecessors, (43), 4 states have return successors, (40), 27 states have call predecessors, (40), 27 states have call successors, (40) [2023-04-01 02:47:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:50,091 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2023-04-01 02:47:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 02:47:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 29 states have call successors, (43), 5 states have call predecessors, (43), 4 states have return successors, (40), 27 states have call predecessors, (40), 27 states have call successors, (40) Word has length 79 [2023-04-01 02:47:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:50,094 INFO L225 Difference]: With dead ends: 148 [2023-04-01 02:47:50,094 INFO L226 Difference]: Without dead ends: 146 [2023-04-01 02:47:50,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1297, Invalid=10247, Unknown=12, NotChecked=0, Total=11556 [2023-04-01 02:47:50,097 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 260 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:50,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 299 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 02:47:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-04-01 02:47:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2023-04-01 02:47:50,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 02:47:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-04-01 02:47:50,125 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 79 [2023-04-01 02:47:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:50,126 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-04-01 02:47:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 42 states have internal predecessors, (87), 29 states have call successors, (43), 5 states have call predecessors, (43), 4 states have return successors, (40), 27 states have call predecessors, (40), 27 states have call successors, (40) [2023-04-01 02:47:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-04-01 02:47:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 02:47:50,128 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:50,128 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:50,135 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 02:47:50,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:50,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:50,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash -293248196, now seen corresponding path program 4 times [2023-04-01 02:47:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:50,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725720511] [2023-04-01 02:47:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:50,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 94 proven. 33 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 02:47:50,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725720511] [2023-04-01 02:47:50,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725720511] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:50,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212382414] [2023-04-01 02:47:50,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:47:50,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:50,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:50,976 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 02:47:50,979 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 02:47:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:51,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 02:47:51,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 116 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 02:47:51,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 116 proven. 11 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-04-01 02:47:52,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212382414] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116443391] [2023-04-01 02:47:52,027 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 02:47:52,027 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:52,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:52,028 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:52,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:52,053 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 02:47:53,410 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 50 for LOIs [2023-04-01 02:47:53,429 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 39 for LOIs [2023-04-01 02:47:53,432 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 23 for LOIs [2023-04-01 02:47:53,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 02:47:53,437 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:47:55,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3547#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((v_main_~a~0.base_BEFORE_CALL_211 Int) (v_main_~i~0_BEFORE_CALL_256 Int)) (and (<= 2 (+ ~SIZE~0 v_main_~i~0_BEFORE_CALL_256)) (<= 0 v_main_~i~0_BEFORE_CALL_256) (< v_main_~i~0_BEFORE_CALL_256 ~SIZE~0) (<= 1 (+ v_main_~i~0_BEFORE_CALL_256 |#StackHeapBarrier|)) (<= (+ v_main_~a~0.base_BEFORE_CALL_211 1) |#StackHeapBarrier|) (<= ~SIZE~0 (+ 99999 v_main_~i~0_BEFORE_CALL_256)) (= (select (select |#memory_int| v_main_~a~0.base_BEFORE_CALL_211) (* v_main_~i~0_BEFORE_CALL_256 4)) 0))) (<= ~SIZE~0 99999) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:47:55,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:47:55,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:47:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15] total 44 [2023-04-01 02:47:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631859079] [2023-04-01 02:47:55,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:47:55,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-01 02:47:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-01 02:47:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=4429, Unknown=8, NotChecked=0, Total=5112 [2023-04-01 02:47:55,656 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 35 states have call successors, (54), 4 states have call predecessors, (54), 3 states have return successors, (52), 34 states have call predecessors, (52), 34 states have call successors, (52) [2023-04-01 02:47:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:56,102 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2023-04-01 02:47:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 02:47:56,103 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 35 states have call successors, (54), 4 states have call predecessors, (54), 3 states have return successors, (52), 34 states have call predecessors, (52), 34 states have call successors, (52) Word has length 107 [2023-04-01 02:47:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:56,107 INFO L225 Difference]: With dead ends: 143 [2023-04-01 02:47:56,107 INFO L226 Difference]: Without dead ends: 93 [2023-04-01 02:47:56,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=834, Invalid=5320, Unknown=8, NotChecked=0, Total=6162 [2023-04-01 02:47:56,111 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 79 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:47:56,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 69 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:47:56,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-01 02:47:56,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2023-04-01 02:47:56,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 02:47:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2023-04-01 02:47:56,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 107 [2023-04-01 02:47:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:56,153 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2023-04-01 02:47:56,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 35 states have call successors, (54), 4 states have call predecessors, (54), 3 states have return successors, (52), 34 states have call predecessors, (52), 34 states have call successors, (52) [2023-04-01 02:47:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2023-04-01 02:47:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-04-01 02:47:56,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:56,160 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 9, 9, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:47:56,171 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 02:47:56,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:56,368 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:56,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:56,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1797818803, now seen corresponding path program 5 times [2023-04-01 02:47:56,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:56,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755035900] [2023-04-01 02:47:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:56,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 16 proven. 130 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-04-01 02:47:57,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755035900] [2023-04-01 02:47:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755035900] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14959090] [2023-04-01 02:47:57,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:47:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:57,984 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 02:47:57,987 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 02:47:58,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-04-01 02:47:58,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:47:58,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 87 conjunts are in the unsatisfiable core [2023-04-01 02:47:58,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:58,995 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 13 treesize of output 9 [2023-04-01 02:47:59,000 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 13 treesize of output 9 [2023-04-01 02:48:13,123 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 0 case distinctions, treesize of input 47 treesize of output 65 [2023-04-01 02:48:13,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-04-01 02:48:13,147 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 43 treesize of output 29 [2023-04-01 02:48:13,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2023-04-01 02:48:13,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:13,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2023-04-01 02:48:13,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2023-04-01 02:48:13,327 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 68 treesize of output 50 [2023-04-01 02:48:13,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2023-04-01 02:48:13,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:13,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 109 [2023-04-01 02:48:13,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2023-04-01 02:48:13,517 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 73 treesize of output 55 [2023-04-01 02:48:13,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35