/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:34:37,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:34:37,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:34:37,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:34:37,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:34:37,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:34:37,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:34:37,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:34:37,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:34:37,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:34:37,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:34:37,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:34:37,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:34:37,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:34:37,463 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:34:37,464 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:34:37,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:34:37,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:34:37,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:34:37,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:34:37,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:34:37,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:34:37,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:34:37,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:34:37,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 20:34:37,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 20:34:37,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 20:34:37,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 20:34:37,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 20:34:37,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 20:34:37,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 20:34:37,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 20:34:37,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 20:34:37,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 20:34:37,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 20:34:37,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 20:34:37,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 20:34:37,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 20:34:37,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:34:37,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:34:37,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:34:37,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 20:34:37,520 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:34:37,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:34:37,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:34:37,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:34:37,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:34:37,522 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:34:37,522 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:34:37,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:34:37,522 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:34:37,522 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:34:37,523 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:34:37,523 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:34:37,524 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:34:37,524 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:34:37,524 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:34:37,524 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:34:37,524 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:34:37,524 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:34:37,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:34:37,525 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:34:37,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:34:37,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:34:37,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:34:37,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:34:37,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:34:37,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:34:37,526 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:34:37,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:34:37,526 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:34:37,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:34:37,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:34:37,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:34:37,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:34:37,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:34:37,527 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:34:37,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:34:37,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:34:37,528 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:34:37,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:34:37,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:34:37,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:34:37,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:34:37,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:34:37,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:34:37,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:34:37,810 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:34:37,811 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:34:37,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2023-03-31 20:34:38,992 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:34:39,194 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:34:39,195 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2023-03-31 20:34:39,201 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa39ec4/d665630d50604e409e2bab683c1f1015/FLAG5ba4cb5e9 [2023-03-31 20:34:39,213 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa39ec4/d665630d50604e409e2bab683c1f1015 [2023-03-31 20:34:39,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:34:39,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:34:39,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:34:39,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:34:39,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:34:39,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95e47e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39, skipping insertion in model container [2023-03-31 20:34:39,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:34:39,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:34:39,348 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-examples/sanfoundry_10_ground.c[324,337] [2023-03-31 20:34:39,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:34:39,379 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:34:39,390 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-examples/sanfoundry_10_ground.c[324,337] [2023-03-31 20:34:39,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:34:39,422 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:34:39,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39 WrapperNode [2023-03-31 20:34:39,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:34:39,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:34:39,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:34:39,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:34:39,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,457 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:34:39,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:34:39,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:34:39,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:34:39,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (1/1) ... [2023-03-31 20:34:39,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:34:39,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:39,490 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 20:34:39,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 20:34:39,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:34:39,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:34:39,537 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:34:39,538 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 20:34:39,538 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:34:39,538 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:34:39,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:34:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:34:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:34:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:34:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:34:39,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:34:39,611 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:34:39,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:34:39,747 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:34:39,807 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:34:39,807 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-31 20:34:39,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:34:39 BoogieIcfgContainer [2023-03-31 20:34:39,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:34:39,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:34:39,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:34:39,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:34:39,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:34:39" (1/3) ... [2023-03-31 20:34:39,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cedb8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:34:39, skipping insertion in model container [2023-03-31 20:34:39,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:34:39" (2/3) ... [2023-03-31 20:34:39,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79cedb8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:34:39, skipping insertion in model container [2023-03-31 20:34:39,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:34:39" (3/3) ... [2023-03-31 20:34:39,818 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2023-03-31 20:34:39,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:34:39,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:34:39,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:34:39,895 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;@49a979ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:34:39,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:34:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:39,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 20:34:39,906 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:39,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:39,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:39,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash -322072770, now seen corresponding path program 1 times [2023-03-31 20:34:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318284232] [2023-03-31 20:34:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:39,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:34:40,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318284232] [2023-03-31 20:34:40,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318284232] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:40,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:34:40,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:34:40,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529121458] [2023-03-31 20:34:40,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:40,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:34:40,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:40,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:34:40,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:40,161 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:40,205 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-03-31 20:34:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:34:40,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 20:34:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:40,212 INFO L225 Difference]: With dead ends: 41 [2023-03-31 20:34:40,213 INFO L226 Difference]: Without dead ends: 20 [2023-03-31 20:34:40,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:40,219 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:40,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-03-31 20:34:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-03-31 20:34:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:34:40,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-03-31 20:34:40,248 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2023-03-31 20:34:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:40,249 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-03-31 20:34:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,249 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-03-31 20:34:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 20:34:40,250 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:40,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:34:40,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:40,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1605664759, now seen corresponding path program 1 times [2023-03-31 20:34:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767427848] [2023-03-31 20:34:40,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:40,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767427848] [2023-03-31 20:34:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767427848] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:40,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:34:40,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 20:34:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042991120] [2023-03-31 20:34:40,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:40,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 20:34:40,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 20:34:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:34:40,485 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:40,518 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2023-03-31 20:34:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 20:34:40,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 20:34:40,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:40,520 INFO L225 Difference]: With dead ends: 33 [2023-03-31 20:34:40,520 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:34:40,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 20:34:40,522 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:40,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:34:40,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 20:34:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:34:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-03-31 20:34:40,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2023-03-31 20:34:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:40,528 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-03-31 20:34:40,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-03-31 20:34:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 20:34:40,529 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:40,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:40,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 20:34:40,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:40,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash 321890575, now seen corresponding path program 1 times [2023-03-31 20:34:40,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:40,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953445459] [2023-03-31 20:34:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:34:40,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953445459] [2023-03-31 20:34:40,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953445459] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:34:40,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:34:40,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:34:40,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582712411] [2023-03-31 20:34:40,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:34:40,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:34:40,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:34:40,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:40,615 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:40,648 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-03-31 20:34:40,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:34:40,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 20:34:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:40,649 INFO L225 Difference]: With dead ends: 31 [2023-03-31 20:34:40,649 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 20:34:40,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:34:40,650 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:40,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 20:34:40,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 20:34:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:34:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-03-31 20:34:40,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2023-03-31 20:34:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:40,656 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-03-31 20:34:40,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:40,657 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-03-31 20:34:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 20:34:40,657 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:40,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:40,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 20:34:40,658 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:40,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:40,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1298838919, now seen corresponding path program 1 times [2023-03-31 20:34:40,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:40,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681688954] [2023-03-31 20:34:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:40,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:40,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681688954] [2023-03-31 20:34:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681688954] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:40,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61513320] [2023-03-31 20:34:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:40,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:40,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:34:40,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:34:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:41,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 20:34:41,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:41,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 20:34:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61513320] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:41,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576425833] [2023-03-31 20:34:41,164 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:34:41,164 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:41,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:41,175 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:41,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:41,281 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:41,478 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:34:41,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:41,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:42,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '394#(and (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_1| Int)) (and (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_1|) 0) 2147483647) (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_1|) (<= 0 (+ (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_1|) 0) 2147483648)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:42,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:42,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:42,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2023-03-31 20:34:42,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918911528] [2023-03-31 20:34:42,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:42,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 20:34:42,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:42,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 20:34:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-03-31 20:34:42,086 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:42,295 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2023-03-31 20:34:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 20:34:42,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 20:34:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:42,299 INFO L225 Difference]: With dead ends: 57 [2023-03-31 20:34:42,299 INFO L226 Difference]: Without dead ends: 43 [2023-03-31 20:34:42,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-03-31 20:34:42,301 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:42,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 77 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:34:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-03-31 20:34:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2023-03-31 20:34:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:34:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-03-31 20:34:42,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2023-03-31 20:34:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:42,316 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-03-31 20:34:42,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-03-31 20:34:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 20:34:42,317 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:42,317 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:42,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:42,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:42,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:42,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1978266888, now seen corresponding path program 2 times [2023-03-31 20:34:42,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:42,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649268092] [2023-03-31 20:34:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:42,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 20:34:42,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:42,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649268092] [2023-03-31 20:34:42,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649268092] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:42,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953955359] [2023-03-31 20:34:42,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:34:42,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:42,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:34:42,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:34:42,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:34:42,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:42,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 20:34:42,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:42,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-03-31 20:34:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:42,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:34:42,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953955359] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:42,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601812052] [2023-03-31 20:34:42,936 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:34:42,936 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:42,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:42,937 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:42,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:42,968 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:43,062 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:34:43,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:43,082 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:43,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '698#(and (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_2| Int)) (and (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_2|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_2|) 0) 2147483648)) (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_2|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:43,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:43,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:43,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-03-31 20:34:43,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840053948] [2023-03-31 20:34:43,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:43,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 20:34:43,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 20:34:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-03-31 20:34:43,593 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:43,883 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2023-03-31 20:34:43,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 20:34:43,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-03-31 20:34:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:43,884 INFO L225 Difference]: With dead ends: 80 [2023-03-31 20:34:43,885 INFO L226 Difference]: Without dead ends: 61 [2023-03-31 20:34:43,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2023-03-31 20:34:43,886 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:43,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 63 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:34:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-03-31 20:34:43,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2023-03-31 20:34:43,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:34:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2023-03-31 20:34:43,896 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 21 [2023-03-31 20:34:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:43,896 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2023-03-31 20:34:43,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2023-03-31 20:34:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 20:34:43,897 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:43,897 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:43,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:44,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:44,103 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:44,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1802602236, now seen corresponding path program 1 times [2023-03-31 20:34:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:44,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937385055] [2023-03-31 20:34:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:44,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:34:44,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937385055] [2023-03-31 20:34:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937385055] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104920289] [2023-03-31 20:34:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:44,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:44,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:34:44,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:34:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:44,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 20:34:44,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:34:44,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:34:44,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104920289] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:44,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314827436] [2023-03-31 20:34:44,549 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:34:44,549 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:44,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:44,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:44,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:44,567 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:44,646 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:34:44,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:44,662 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:45,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_3| Int)) (and (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_3|) (<= 0 (+ 2147483648 (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_3|) 0))) (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_3|) 0) 2147483647))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:45,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:45,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-03-31 20:34:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141828347] [2023-03-31 20:34:45,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 20:34:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 20:34:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1197, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 20:34:45,125 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:45,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:45,188 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2023-03-31 20:34:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 20:34:45,189 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-03-31 20:34:45,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:45,189 INFO L225 Difference]: With dead ends: 86 [2023-03-31 20:34:45,189 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 20:34:45,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1197, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 20:34:45,191 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:45,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:34:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 20:34:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-03-31 20:34:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:34:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-03-31 20:34:45,201 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 26 [2023-03-31 20:34:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:45,202 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-03-31 20:34:45,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-03-31 20:34:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 20:34:45,203 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:45,203 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:45,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:45,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:45,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:45,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1060514767, now seen corresponding path program 2 times [2023-03-31 20:34:45,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:45,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399061264] [2023-03-31 20:34:45,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:45,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 20:34:45,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:45,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399061264] [2023-03-31 20:34:45,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399061264] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:45,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729747847] [2023-03-31 20:34:45,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:34:45,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:45,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:45,857 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:34:45,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:34:45,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:34:45,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:45,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-31 20:34:45,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:46,083 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-03-31 20:34:46,083 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 1 case distinctions, treesize of input 22 treesize of output 25 [2023-03-31 20:34:46,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-03-31 20:34:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-03-31 20:34:46,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:46,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-03-31 20:34:46,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:34:46,568 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 30 treesize of output 24 [2023-03-31 20:34:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-03-31 20:34:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729747847] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [908053566] [2023-03-31 20:34:46,647 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:34:46,647 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:46,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:46,647 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:46,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:46,663 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:46,764 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:34:46,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:46,779 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:47,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1618#(and (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_4| Int)) (and (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_4|) (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_4|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_4|) 0) 2147483648)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:47,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:47,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:47,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 12] total 38 [2023-03-31 20:34:47,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761524530] [2023-03-31 20:34:47,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:47,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-03-31 20:34:47,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-03-31 20:34:47,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2023-03-31 20:34:47,432 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:34:48,509 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2023-03-31 20:34:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-03-31 20:34:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2023-03-31 20:34:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:34:48,511 INFO L225 Difference]: With dead ends: 126 [2023-03-31 20:34:48,512 INFO L226 Difference]: Without dead ends: 97 [2023-03-31 20:34:48,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1507, Invalid=6683, Unknown=0, NotChecked=0, Total=8190 [2023-03-31 20:34:48,515 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 20:34:48,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 119 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 20:34:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-03-31 20:34:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2023-03-31 20:34:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 56 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:34:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-03-31 20:34:48,535 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 35 [2023-03-31 20:34:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:34:48,536 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-03-31 20:34:48,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 36 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:48,537 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-03-31 20:34:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 20:34:48,540 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:34:48,540 INFO L195 NwaCegarLoop]: trace histogram [17, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:34:48,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:34:48,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:48,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:34:48,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:34:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1873811524, now seen corresponding path program 3 times [2023-03-31 20:34:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:34:48,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250291216] [2023-03-31 20:34:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:34:48,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:34:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:34:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:34:49,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:34:49,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250291216] [2023-03-31 20:34:49,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250291216] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:34:49,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973056808] [2023-03-31 20:34:49,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:34:49,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:34:49,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:34:49,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:34:49,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:34:49,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:34:49,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:34:49,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2023-03-31 20:34:49,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:34:49,443 INFO L321 Elim1Store]: treesize reduction 52, result has 52.7 percent of original size [2023-03-31 20:34:49,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 98 [2023-03-31 20:34:49,747 INFO L321 Elim1Store]: treesize reduction 52, result has 52.7 percent of original size [2023-03-31 20:34:49,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 113 [2023-03-31 20:34:50,433 INFO L321 Elim1Store]: treesize reduction 52, result has 52.7 percent of original size [2023-03-31 20:34:50,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2023-03-31 20:34:50,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-03-31 20:34:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-03-31 20:34:50,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:34:55,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2023-03-31 20:34:55,684 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-03-31 20:34:55,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 117 [2023-03-31 20:34:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-03-31 20:34:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973056808] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:34:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355265200] [2023-03-31 20:34:55,742 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:34:55,742 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:34:55,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:34:55,743 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:34:55,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:34:55,763 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:34:55,848 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:34:55,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:34:55,860 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:34:56,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2298#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_5| Int)) (and (<= 0 (+ (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_5|) 0) 2147483648)) (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_5|) 0) 2147483647) (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_5|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:34:56,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:34:56,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:34:56,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 42 [2023-03-31 20:34:56,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594497413] [2023-03-31 20:34:56,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:34:56,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-03-31 20:34:56,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:34:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-03-31 20:34:56,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2739, Unknown=4, NotChecked=0, Total=3080 [2023-03-31 20:34:56,687 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 42 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 40 states have internal predecessors, (59), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:34:58,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 20:35:00,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 20:35:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:22,227 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2023-03-31 20:35:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-03-31 20:35:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 40 states have internal predecessors, (59), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-03-31 20:35:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:22,229 INFO L225 Difference]: With dead ends: 137 [2023-03-31 20:35:22,230 INFO L226 Difference]: Without dead ends: 97 [2023-03-31 20:35:22,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=1072, Invalid=6756, Unknown=4, NotChecked=0, Total=7832 [2023-03-31 20:35:22,232 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 85 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 106 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:22,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 130 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 591 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2023-03-31 20:35:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-03-31 20:35:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2023-03-31 20:35:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2) internal successors, (72), 61 states have internal predecessors, (72), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:35:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2023-03-31 20:35:22,257 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 38 [2023-03-31 20:35:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:22,257 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2023-03-31 20:35:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 40 states have internal predecessors, (59), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2023-03-31 20:35:22,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-03-31 20:35:22,258 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:22,258 INFO L195 NwaCegarLoop]: trace histogram [18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:22,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:22,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:22,464 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:22,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:22,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1649166596, now seen corresponding path program 4 times [2023-03-31 20:35:22,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:22,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134018923] [2023-03-31 20:35:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:22,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:35:22,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:22,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134018923] [2023-03-31 20:35:22,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134018923] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:22,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457939958] [2023-03-31 20:35:22,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:35:22,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:22,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:22,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:22,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:35:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:22,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-31 20:35:22,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:35:23,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:35:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457939958] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:23,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930975623] [2023-03-31 20:35:23,727 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:35:23,727 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:23,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:23,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:23,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:23,750 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:23,833 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:35:23,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:23,845 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:24,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3026#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_6| Int)) (and (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_6|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_6|) 0) 2147483648)) (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_6|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:35:24,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:24,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:24,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2023-03-31 20:35:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896257253] [2023-03-31 20:35:24,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-03-31 20:35:24,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-03-31 20:35:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1617, Invalid=3639, Unknown=0, NotChecked=0, Total=5256 [2023-03-31 20:35:24,311 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:24,416 INFO L93 Difference]: Finished difference Result 140 states and 184 transitions. [2023-03-31 20:35:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-03-31 20:35:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2023-03-31 20:35:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:24,417 INFO L225 Difference]: With dead ends: 140 [2023-03-31 20:35:24,417 INFO L226 Difference]: Without dead ends: 96 [2023-03-31 20:35:24,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1617, Invalid=3639, Unknown=0, NotChecked=0, Total=5256 [2023-03-31 20:35:24,419 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:24,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 78 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:35:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-03-31 20:35:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2023-03-31 20:35:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:35:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2023-03-31 20:35:24,448 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 40 [2023-03-31 20:35:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:24,449 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2023-03-31 20:35:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2023-03-31 20:35:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 20:35:24,450 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:24,450 INFO L195 NwaCegarLoop]: trace histogram [38, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:24,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:24,654 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:24,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 386600124, now seen corresponding path program 5 times [2023-03-31 20:35:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794972676] [2023-03-31 20:35:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 20:35:25,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794972676] [2023-03-31 20:35:25,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794972676] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753143443] [2023-03-31 20:35:25,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:35:25,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:25,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:25,925 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:25,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:35:26,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:35:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:35:26,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:35:26,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:26,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2023-03-31 20:35:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2023-03-31 20:35:26,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:26,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2023-03-31 20:35:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 763 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2023-03-31 20:35:26,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753143443] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:26,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818933339] [2023-03-31 20:35:26,347 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-03-31 20:35:26,347 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:26,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:26,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:26,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:26,361 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:26,436 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2023-03-31 20:35:26,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:26,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:27,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3852#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_7| Int)) (and (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_7|) (<= 0 (+ (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_7|) 0) 2147483648)) (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_7|) 0) 2147483647))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:35:27,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:27,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:27,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 7, 7] total 48 [2023-03-31 20:35:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108684750] [2023-03-31 20:35:27,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:27,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-03-31 20:35:27,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:27,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-03-31 20:35:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=2876, Unknown=0, NotChecked=0, Total=3782 [2023-03-31 20:35:27,093 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 48 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:28,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:28,094 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2023-03-31 20:35:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-03-31 20:35:28,094 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-03-31 20:35:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:28,095 INFO L225 Difference]: With dead ends: 134 [2023-03-31 20:35:28,095 INFO L226 Difference]: Without dead ends: 80 [2023-03-31 20:35:28,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2235 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2636, Invalid=7870, Unknown=0, NotChecked=0, Total=10506 [2023-03-31 20:35:28,098 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:28,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:35:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-03-31 20:35:28,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-03-31 20:35:28,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 73 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:35:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2023-03-31 20:35:28,122 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 60 [2023-03-31 20:35:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:28,122 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2023-03-31 20:35:28,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:35:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2023-03-31 20:35:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 20:35:28,123 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:28,123 INFO L195 NwaCegarLoop]: trace histogram [39, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:28,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:28,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:28,329 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:28,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash 739139306, now seen corresponding path program 1 times [2023-03-31 20:35:28,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:28,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846082339] [2023-03-31 20:35:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:28,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 2 proven. 780 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:35:29,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:29,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846082339] [2023-03-31 20:35:29,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846082339] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:29,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831809685] [2023-03-31 20:35:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:29,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:29,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:29,568 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:29,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:35:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:29,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 42 conjunts are in the unsatisfiable core [2023-03-31 20:35:29,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 20:35:30,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 2 proven. 780 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:35:32,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831809685] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:32,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219673142] [2023-03-31 20:35:32,313 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:35:32,313 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:32,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:32,314 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:32,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:32,325 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:32,444 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-03-31 20:35:32,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:32,461 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:35:33,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4840#(and (exists ((|v_main_~#vectorx~0.base_BEFORE_CALL_12| Int) (v_main_~x~0_BEFORE_CALL_12 Int)) (and (<= 0 (+ (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_12|) (* v_main_~x~0_BEFORE_CALL_12 4)) 2147483648)) (<= 0 v_main_~x~0_BEFORE_CALL_12) (<= (select (select |#memory_int| |v_main_~#vectorx~0.base_BEFORE_CALL_12|) (* v_main_~x~0_BEFORE_CALL_12 4)) 2147483647) (<= 0 |v_main_~#vectorx~0.base_BEFORE_CALL_12|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 20:35:33,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:35:33,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:35:33,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 122 [2023-03-31 20:35:33,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766830867] [2023-03-31 20:35:33,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:35:33,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-03-31 20:35:33,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:35:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-03-31 20:35:33,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6709, Invalid=12196, Unknown=1, NotChecked=0, Total=18906 [2023-03-31 20:35:33,987 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 122 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 122 states have internal predecessors, (140), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:35:34,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:35:34,168 INFO L93 Difference]: Finished difference Result 164 states and 225 transitions. [2023-03-31 20:35:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-03-31 20:35:34,169 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 122 states have internal predecessors, (140), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2023-03-31 20:35:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:35:34,170 INFO L225 Difference]: With dead ends: 164 [2023-03-31 20:35:34,170 INFO L226 Difference]: Without dead ends: 129 [2023-03-31 20:35:34,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9495 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6709, Invalid=12196, Unknown=1, NotChecked=0, Total=18906 [2023-03-31 20:35:34,172 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:35:34,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 70 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:35:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-03-31 20:35:34,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2023-03-31 20:35:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 114 states have internal predecessors, (123), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 20:35:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2023-03-31 20:35:34,216 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 65 [2023-03-31 20:35:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:35:34,217 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2023-03-31 20:35:34,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1475409836065573) internal successors, (140), 122 states have internal predecessors, (140), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 20:35:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2023-03-31 20:35:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-03-31 20:35:34,218 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:35:34,218 INFO L195 NwaCegarLoop]: trace histogram [80, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:35:34,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 20:35:34,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 20:35:34,423 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:35:34,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:35:34,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1706572865, now seen corresponding path program 2 times [2023-03-31 20:35:34,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:35:34,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681294511] [2023-03-31 20:35:34,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:35:34,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:35:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:35:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 2 proven. 3240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 20:35:38,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:35:38,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681294511] [2023-03-31 20:35:38,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681294511] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:35:38,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128428257] [2023-03-31 20:35:38,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:35:38,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:35:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:35:38,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 20:35:38,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:35:38,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 20:35:38,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:35:38,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 20:35:38,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:35:38,907 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-03-31 20:35:38,907 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 1 case distinctions, treesize of input 22 treesize of output 25 [2023-03-31 20:35:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-03-31 20:35:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2023-03-31 20:35:39,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:35:39,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-03-31 20:35:39,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:35:39,900 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 32 treesize of output 24 [2023-03-31 20:35:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2023-03-31 20:35:40,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128428257] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:35:40,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048818820] [2023-03-31 20:35:40,115 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 20:35:40,115 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:35:40,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:35:40,116 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:35:40,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:35:40,129 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 17 for LOIs [2023-03-31 20:35:40,254 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-03-31 20:35:40,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 20:35:40,273 INFO L180 IcfgInterpreter]: Interpretation finished