/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/heap-data/calendar.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:59:38,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:59:38,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:59:38,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:59:38,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:59:38,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:59:38,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:59:38,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:59:38,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:59:38,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:59:38,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:59:38,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:59:38,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:59:38,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:59:38,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:59:38,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:59:38,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:59:38,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:59:38,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:59:38,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:59:38,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:59:38,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:59:38,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:59:38,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:59:38,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:59:38,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:59:38,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:59:38,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:59:38,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:59:38,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:59:38,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:59:38,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:59:38,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:59:38,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:59:38,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:59:38,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:59:38,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:59:38,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:59:38,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:59:38,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:59:38,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:59:38,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:59:38,439 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:59:38,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:59:38,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:59:38,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:59:38,441 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:59:38,441 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:59:38,441 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:59:38,441 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:59:38,441 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:59:38,441 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:59:38,442 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:59:38,442 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:59:38,442 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:59:38,442 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:59:38,442 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:59:38,443 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:59:38,443 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:59:38,443 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:59:38,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:59:38,443 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:59:38,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:59:38,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:59:38,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:59:38,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:59:38,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:59:38,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:59:38,445 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:59:38,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:59:38,445 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:59:38,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:59:38,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:59:38,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:59:38,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:59:38,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:59:38,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:59:38,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:59:38,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:59:38,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:59:38,709 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:59:38,710 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:59:38,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-data/calendar.i [2023-04-01 10:59:39,893 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:59:40,153 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:59:40,154 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-data/calendar.i [2023-04-01 10:59:40,173 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66977750a/d4bd26fb5cdf41b0be695fd893cacf48/FLAG6ab34d4a1 [2023-04-01 10:59:40,193 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66977750a/d4bd26fb5cdf41b0be695fd893cacf48 [2023-04-01 10:59:40,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:59:40,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:59:40,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:59:40,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:59:40,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:59:40,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fece714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40, skipping insertion in model container [2023-04-01 10:59:40,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:59:40,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:59:40,484 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/heap-data/calendar.i[23742,23755] [2023-04-01 10:59:40,488 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:59:40,496 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:59:40,530 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/heap-data/calendar.i[23742,23755] [2023-04-01 10:59:40,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:59:40,552 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:59:40,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40 WrapperNode [2023-04-01 10:59:40,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:59:40,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:59:40,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:59:40,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:59:40,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:59:40,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:59:40,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:59:40,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:59:40,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (1/1) ... [2023-04-01 10:59:40,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:59:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:59:40,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:59:40,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:59:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:59:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:59:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:59:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:59:40,700 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:59:40,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:59:40,701 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:59:40,702 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:59:40,703 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:59:40,704 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:59:40,705 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:59:40,706 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:59:40,707 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:59:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:59:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:59:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 10:59:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:59:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:59:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:59:40,717 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:59:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:59:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:59:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:59:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:59:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:59:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:59:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:59:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:59:40,987 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:59:40,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:59:41,234 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:59:41,279 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:59:41,280 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 10:59:41,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:59:41 BoogieIcfgContainer [2023-04-01 10:59:41,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:59:41,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:59:41,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:59:41,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:59:41,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:59:40" (1/3) ... [2023-04-01 10:59:41,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf7ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:59:41, skipping insertion in model container [2023-04-01 10:59:41,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:59:40" (2/3) ... [2023-04-01 10:59:41,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf7ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:59:41, skipping insertion in model container [2023-04-01 10:59:41,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:59:41" (3/3) ... [2023-04-01 10:59:41,289 INFO L112 eAbstractionObserver]: Analyzing ICFG calendar.i [2023-04-01 10:59:41,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:59:41,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:59:41,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:59:41,347 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;@7ff35045, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:59:41,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:59:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:59:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 10:59:41,357 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:59:41,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:59:41,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:59:41,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:59:41,365 INFO L85 PathProgramCache]: Analyzing trace with hash 259723485, now seen corresponding path program 1 times [2023-04-01 10:59:41,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:59:41,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30635387] [2023-04-01 10:59:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:41,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:59:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:41,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:59:41,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30635387] [2023-04-01 10:59:41,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30635387] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:59:41,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:59:41,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 10:59:41,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884260691] [2023-04-01 10:59:41,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:59:41,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 10:59:41,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:59:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 10:59:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 10:59:41,557 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:59:41,591 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-04-01 10:59:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 10:59:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 10:59:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:59:41,598 INFO L225 Difference]: With dead ends: 28 [2023-04-01 10:59:41,599 INFO L226 Difference]: Without dead ends: 16 [2023-04-01 10:59:41,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 10:59:41,604 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:59:41,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:59:41,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-01 10:59:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-01 10:59:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-04-01 10:59:41,634 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2023-04-01 10:59:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:59:41,634 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-04-01 10:59:41,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-04-01 10:59:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 10:59:41,637 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:59:41,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:59:41,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:59:41,638 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:59:41,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:59:41,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1074057038, now seen corresponding path program 1 times [2023-04-01 10:59:41,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:59:41,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331460938] [2023-04-01 10:59:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:41,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:59:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:41,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:59:41,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331460938] [2023-04-01 10:59:41,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331460938] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:59:41,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:59:41,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 10:59:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680832322] [2023-04-01 10:59:41,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:59:41,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 10:59:41,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:59:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 10:59:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:59:41,810 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:59:41,858 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-04-01 10:59:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 10:59:41,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 10:59:41,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:59:41,860 INFO L225 Difference]: With dead ends: 28 [2023-04-01 10:59:41,860 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 10:59:41,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:59:41,864 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:59:41,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:59:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 10:59:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 10:59:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-04-01 10:59:41,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-04-01 10:59:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:59:41,871 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-04-01 10:59:41,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-04-01 10:59:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 10:59:41,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:59:41,872 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:59:41,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:59:41,872 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:59:41,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:59:41,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1233580613, now seen corresponding path program 1 times [2023-04-01 10:59:41,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:59:41,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164170203] [2023-04-01 10:59:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:41,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:59:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:42,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:59:42,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164170203] [2023-04-01 10:59:42,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164170203] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:59:42,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:59:42,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:59:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390630846] [2023-04-01 10:59:42,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:59:42,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:59:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:59:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:59:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:59:42,710 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:42,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:59:42,913 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-04-01 10:59:42,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 10:59:42,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 10:59:42,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:59:42,915 INFO L225 Difference]: With dead ends: 39 [2023-04-01 10:59:42,916 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 10:59:42,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:59:42,921 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:59:42,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 77 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:59:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 10:59:42,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2023-04-01 10:59:42,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-04-01 10:59:42,932 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 17 [2023-04-01 10:59:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:59:42,933 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-04-01 10:59:42,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-04-01 10:59:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 10:59:42,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:59:42,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:59:42,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:59:42,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:59:42,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:59:42,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1855918906, now seen corresponding path program 1 times [2023-04-01 10:59:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:59:42,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289619032] [2023-04-01 10:59:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:42,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:59:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:43,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:59:43,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289619032] [2023-04-01 10:59:43,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289619032] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:59:43,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043313905] [2023-04-01 10:59:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:43,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:59:43,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:59:43,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:59:43,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:59:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:43,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 10:59:43,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:59:43,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:43,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:43,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:59:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:43,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043313905] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:59:43,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784075242] [2023-04-01 10:59:43,647 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 10:59:43,647 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:59:43,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:59:43,668 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:59:43,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:59:43,770 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:59:45,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:59:45,220 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:59:46,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '386#(or (and (not (= main_~i~0.offset 0)) (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)) (and (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= main_~i~0.base 0)) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)))' at error location [2023-04-01 10:59:46,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:59:46,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:59:46,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-04-01 10:59:46,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276337214] [2023-04-01 10:59:46,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:59:46,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 10:59:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:59:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 10:59:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-04-01 10:59:46,073 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:59:46,169 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-04-01 10:59:46,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:59:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 10:59:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:59:46,170 INFO L225 Difference]: With dead ends: 38 [2023-04-01 10:59:46,171 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 10:59:46,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-04-01 10:59:46,172 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:59:46,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 99 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:59:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 10:59:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 10:59:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-04-01 10:59:46,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2023-04-01 10:59:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:59:46,179 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-04-01 10:59:46,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-04-01 10:59:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:59:46,180 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:59:46,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:59:46,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:59:46,385 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 [2023-04-01 10:59:46,386 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:59:46,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:59:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 131755571, now seen corresponding path program 2 times [2023-04-01 10:59:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:59:46,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685551476] [2023-04-01 10:59:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:59:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:47,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:59:47,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685551476] [2023-04-01 10:59:47,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685551476] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:59:47,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399336788] [2023-04-01 10:59:47,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:59:47,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:59:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:59:47,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:59:47,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:59:47,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 10:59:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:59:47,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 10:59:47,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:59:47,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 10:59:47,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-01 10:59:47,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:47,618 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2023-04-01 10:59:47,619 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 57 treesize of output 49 [2023-04-01 10:59:47,645 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 10:59:47,645 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 15 treesize of output 15 [2023-04-01 10:59:47,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:47,800 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 66 treesize of output 42 [2023-04-01 10:59:47,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 10:59:47,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:47,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 133 [2023-04-01 10:59:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:47,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:59:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:48,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399336788] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:59:48,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479199052] [2023-04-01 10:59:48,308 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 10:59:48,308 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:59:48,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:59:48,309 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:59:48,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:59:48,336 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:59:49,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:59:49,256 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:59:50,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '652#(or (and (not (= main_~i~0.offset 0)) (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)) (and (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= main_~i~0.base 0)) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)))' at error location [2023-04-01 10:59:50,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:59:50,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:59:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-04-01 10:59:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818723872] [2023-04-01 10:59:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:59:50,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 10:59:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:59:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 10:59:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2023-04-01 10:59:50,088 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:59:50,685 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-04-01 10:59:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 10:59:50,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 10:59:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:59:50,687 INFO L225 Difference]: With dead ends: 52 [2023-04-01 10:59:50,687 INFO L226 Difference]: Without dead ends: 50 [2023-04-01 10:59:50,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=855, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 10:59:50,688 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 138 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:59:50,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 172 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:59:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-04-01 10:59:50,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2023-04-01 10:59:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-01 10:59:50,709 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 25 [2023-04-01 10:59:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:59:50,710 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-01 10:59:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:50,710 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-01 10:59:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:59:50,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:59:50,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:59:50,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 10:59:50,913 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 [2023-04-01 10:59:50,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:59:50,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:59:50,913 INFO L85 PathProgramCache]: Analyzing trace with hash -465954482, now seen corresponding path program 3 times [2023-04-01 10:59:50,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:59:50,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425064479] [2023-04-01 10:59:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:50,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:59:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:51,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:59:51,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425064479] [2023-04-01 10:59:51,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425064479] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:59:51,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673264515] [2023-04-01 10:59:51,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 10:59:51,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:59:51,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:59:51,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:59:51,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:59:51,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 10:59:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:59:51,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 10:59:51,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:59:51,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:51,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:51,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 10:59:51,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 10:59:51,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:59:51,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 10:59:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:59:51,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 10:59:51,550 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 10:59:51,550 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 15 treesize of output 15 [2023-04-01 10:59:51,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 10:59:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:51,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:59:51,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:51,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-04-01 10:59:51,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:51,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-04-01 10:59:51,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 10:59:51,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-04-01 10:59:51,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:51,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-04-01 10:59:51,919 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:59:51,921 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 [2023-04-01 10:59:51,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:51,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-04-01 10:59:51,930 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:59:51,931 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 20 treesize of output 8 [2023-04-01 10:59:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673264515] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:59:51,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325676176] [2023-04-01 10:59:51,948 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 10:59:51,948 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:59:51,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:59:51,949 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:59:51,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:59:51,974 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:59:52,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:59:52,792 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:59:53,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '979#(or (and (not (= main_~i~0.offset 0)) (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)) (and (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= main_~i~0.base 0)) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)))' at error location [2023-04-01 10:59:53,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:59:53,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:59:53,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-04-01 10:59:53,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371911150] [2023-04-01 10:59:53,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:59:53,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 10:59:53,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:59:53,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 10:59:53,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2023-04-01 10:59:53,567 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:59:53,728 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-04-01 10:59:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:59:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 10:59:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:59:53,729 INFO L225 Difference]: With dead ends: 49 [2023-04-01 10:59:53,729 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 10:59:53,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2023-04-01 10:59:53,730 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:59:53,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 165 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:59:53,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 10:59:53,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 10:59:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-04-01 10:59:53,738 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 28 [2023-04-01 10:59:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:59:53,738 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-04-01 10:59:53,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:59:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-04-01 10:59:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:59:53,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:59:53,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:59:53,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 10:59:53,945 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 [2023-04-01 10:59:53,945 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:59:53,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:59:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1858461115, now seen corresponding path program 4 times [2023-04-01 10:59:53,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:59:53,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734306952] [2023-04-01 10:59:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:59:53,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:59:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:54,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:59:54,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734306952] [2023-04-01 10:59:54,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734306952] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:59:54,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216274271] [2023-04-01 10:59:54,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 10:59:54,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:59:54,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:59:54,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:59:55,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 10:59:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:59:55,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 77 conjunts are in the unsatisfiable core [2023-04-01 10:59:55,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:59:55,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-01 10:59:55,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 10:59:55,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:59:55,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-04-01 10:59:55,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:55,284 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 10:59:55,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 10:59:55,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:59:55,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 10:59:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:59:55,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2023-04-01 10:59:55,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:59:55,470 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-04-01 10:59:55,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-04-01 10:59:55,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:59:55,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-04-01 10:59:55,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 10:59:55,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 45 [2023-04-01 10:59:55,906 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-04-01 10:59:55,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 181 treesize of output 151 [2023-04-01 10:59:55,972 INFO L321 Elim1Store]: treesize reduction 24, result has 70.4 percent of original size [2023-04-01 10:59:55,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 129 [2023-04-01 10:59:57,287 INFO L321 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-04-01 10:59:57,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 146 [2023-04-01 10:59:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:57,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:59:57,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:57,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 130 [2023-04-01 10:59:57,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:57,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 118 [2023-04-01 10:59:57,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:57,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 229 treesize of output 206 [2023-04-01 10:59:57,916 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 366 treesize of output 346 [2023-04-01 10:59:57,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 335 [2023-04-01 10:59:57,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:59:57,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 280 [2023-04-01 10:59:57,939 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 484 treesize of output 448 [2023-04-01 10:59:57,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 201 [2023-04-01 10:59:57,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 199 [2023-04-01 10:59:57,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 197 [2023-04-01 10:59:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:59:58,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216274271] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:59:58,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040924034] [2023-04-01 10:59:58,245 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 10:59:58,245 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:59:58,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:59:58,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:59:58,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:59:58,266 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:59:58,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:59:58,978 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:59:59,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1326#(or (and (not (= main_~i~0.offset 0)) (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)) (and (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= main_~i~0.base 0)) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)))' at error location [2023-04-01 10:59:59,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:59:59,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:59:59,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-04-01 10:59:59,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401238498] [2023-04-01 10:59:59,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:59:59,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 10:59:59,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:59:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 10:59:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2023-04-01 10:59:59,843 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:02,092 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-04-01 11:00:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 11:00:02,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-04-01 11:00:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:02,093 INFO L225 Difference]: With dead ends: 65 [2023-04-01 11:00:02,093 INFO L226 Difference]: Without dead ends: 63 [2023-04-01 11:00:02,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 11:00:02,095 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 203 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:02,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 291 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:00:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-04-01 11:00:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2023-04-01 11:00:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-04-01 11:00:02,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 33 [2023-04-01 11:00:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:02,106 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-04-01 11:00:02,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-04-01 11:00:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 11:00:02,107 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:02,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:02,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 11:00:02,313 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 [2023-04-01 11:00:02,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:02,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1004397370, now seen corresponding path program 5 times [2023-04-01 11:00:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:02,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120038799] [2023-04-01 11:00:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:02,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:03,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:03,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120038799] [2023-04-01 11:00:03,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120038799] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:03,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593433873] [2023-04-01 11:00:03,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:00:03,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:03,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:03,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:00:03,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:00:03,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 11:00:03,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:00:03,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 81 conjunts are in the unsatisfiable core [2023-04-01 11:00:03,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:03,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 11:00:03,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 11:00:03,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 11:00:03,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 11:00:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:03,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 11:00:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:03,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 11:00:03,308 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 11:00:03,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 11:00:03,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 11:00:03,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 11:00:03,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:03,424 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-01 11:00:03,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2023-04-01 11:00:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:03,437 INFO L321 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2023-04-01 11:00:03,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 53 [2023-04-01 11:00:03,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 11:00:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:03,460 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-04-01 11:00:03,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-04-01 11:00:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:03,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:03,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:03,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2023-04-01 11:00:03,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:03,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2023-04-01 11:00:04,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:04,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 127 [2023-04-01 11:00:04,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:04,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 118 [2023-04-01 11:00:04,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:04,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 78 [2023-04-01 11:00:04,890 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:04,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 54 [2023-04-01 11:00:04,893 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:04,895 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 36 [2023-04-01 11:00:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:04,900 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 80 treesize of output 68 [2023-04-01 11:00:04,911 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-04-01 11:00:04,911 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 26 [2023-04-01 11:00:04,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:04,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-04-01 11:00:04,926 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:04,933 INFO L321 Elim1Store]: treesize reduction 32, result has 11.1 percent of original size [2023-04-01 11:00:04,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 222 [2023-04-01 11:00:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:04,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593433873] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:04,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832653322] [2023-04-01 11:00:04,957 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 11:00:04,957 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:04,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:04,958 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:04,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:04,979 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:05,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:05,700 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:06,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1749#(or (and (not (= main_~i~0.offset 0)) (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)) (and (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= main_~i~0.base 0)) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)))' at error location [2023-04-01 11:00:06,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:06,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:06,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2023-04-01 11:00:06,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217841201] [2023-04-01 11:00:06,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:06,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 11:00:06,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 11:00:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:00:06,630 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:06,936 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-04-01 11:00:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:00:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-04-01 11:00:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:06,937 INFO L225 Difference]: With dead ends: 60 [2023-04-01 11:00:06,937 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 11:00:06,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2023-04-01 11:00:06,938 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:06,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 366 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:00:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 11:00:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-01 11:00:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-04-01 11:00:06,948 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 36 [2023-04-01 11:00:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:06,949 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-04-01 11:00:06,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-04-01 11:00:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 11:00:06,950 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:06,950 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:06,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 11:00:07,157 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 [2023-04-01 11:00:07,158 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:07,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:07,158 INFO L85 PathProgramCache]: Analyzing trace with hash 432874547, now seen corresponding path program 6 times [2023-04-01 11:00:07,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:07,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304498779] [2023-04-01 11:00:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:07,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:09,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304498779] [2023-04-01 11:00:09,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304498779] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:09,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123968674] [2023-04-01 11:00:09,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:00:09,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:09,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:00:09,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:00:09,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:00:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:00:09,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 105 conjunts are in the unsatisfiable core [2023-04-01 11:00:09,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:09,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 11:00:09,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2023-04-01 11:00:09,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 11:00:09,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 11:00:09,458 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 11:00:09,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 11:00:09,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 11:00:09,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 11:00:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2023-04-01 11:00:09,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 11:00:09,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 11:00:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2023-04-01 11:00:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,647 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-04-01 11:00:09,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-04-01 11:00:09,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 11:00:09,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-01 11:00:09,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 47 [2023-04-01 11:00:09,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,900 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-01 11:00:09,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 104 [2023-04-01 11:00:09,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:09,915 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-04-01 11:00:09,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-04-01 11:00:09,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 11:00:10,807 INFO L321 Elim1Store]: treesize reduction 40, result has 76.3 percent of original size [2023-04-01 11:00:10,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 305 treesize of output 257 [2023-04-01 11:00:10,941 INFO L321 Elim1Store]: treesize reduction 56, result has 66.9 percent of original size [2023-04-01 11:00:10,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 121 treesize of output 205 [2023-04-01 11:00:15,922 INFO L321 Elim1Store]: treesize reduction 28, result has 20.0 percent of original size [2023-04-01 11:00:15,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 146 [2023-04-01 11:00:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:15,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:16,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:16,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 266 [2023-04-01 11:00:16,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:16,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 230 [2023-04-01 11:00:16,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:16,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 421 treesize of output 392 [2023-04-01 11:00:16,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:16,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 385 treesize of output 356 [2023-04-01 11:00:17,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:17,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 685 treesize of output 598 [2023-04-01 11:00:17,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:17,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 589 treesize of output 502 [2023-04-01 11:00:17,273 INFO L321 Elim1Store]: treesize reduction 183, result has 40.0 percent of original size [2023-04-01 11:00:17,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 6058 treesize of output 5855 [2023-04-01 11:00:17,420 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2023-04-01 11:00:17,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7928 treesize of output 7752 [2023-04-01 11:00:17,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 882 treesize of output 804 [2023-04-01 11:00:17,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 814 treesize of output 776 [2023-04-01 11:00:17,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 754 treesize of output 748 [2023-04-01 11:00:17,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 704 [2023-04-01 11:00:17,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 770 treesize of output 696 [2023-04-01 11:00:17,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 706 treesize of output 668 [2023-04-01 11:00:17,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 620 treesize of output 614 [2023-04-01 11:00:17,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 642 treesize of output 636 [2023-04-01 11:00:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123968674] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578943287] [2023-04-01 11:00:18,804 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 11:00:18,804 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:18,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:18,804 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:18,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:18,826 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:19,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:19,503 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:20,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2177#(or (and (not (= main_~i~0.offset 0)) (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)) (and (= main_~l~0.offset 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (= (select |old(#length)| 2) 11) (not (= |#StackHeapBarrier| 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= main_~i~0.base 0)) (= |#NULL.offset| 0) (= (select (select |old(#memory_int)| 1) 1) 0) (not (= |#StackHeapBarrier| main_~l~0.base)) (= (select |old(#valid)| 2) 1) (= |#NULL.base| 0)))' at error location [2023-04-01 11:00:20,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:20,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:20,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2023-04-01 11:00:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889584798] [2023-04-01 11:00:20,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 11:00:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:20,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 11:00:20,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2023-04-01 11:00:20,464 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:25,059 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-04-01 11:00:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 11:00:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-01 11:00:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:25,060 INFO L225 Difference]: With dead ends: 78 [2023-04-01 11:00:25,061 INFO L226 Difference]: Without dead ends: 76 [2023-04-01 11:00:25,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=590, Invalid=2380, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 11:00:25,062 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 280 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:25,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 411 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:00:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-04-01 11:00:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 47. [2023-04-01 11:00:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-04-01 11:00:25,074 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 41 [2023-04-01 11:00:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:25,074 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-04-01 11:00:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 23 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 11:00:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-04-01 11:00:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 11:00:25,075 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:25,075 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:25,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 11:00:25,277 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 [2023-04-01 11:00:25,278 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:25,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:25,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2017221810, now seen corresponding path program 7 times [2023-04-01 11:00:25,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:25,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580155513] [2023-04-01 11:00:25,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:25,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:26,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:26,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580155513] [2023-04-01 11:00:26,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580155513] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:26,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817465580] [2023-04-01 11:00:26,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:00:26,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:26,565 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:00:26,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:00:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:26,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 108 conjunts are in the unsatisfiable core [2023-04-01 11:00:26,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:26,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 11:00:26,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 11:00:26,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 11:00:26,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 11:00:26,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:26,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-04-01 11:00:26,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 11:00:26,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:26,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 11:00:26,902 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-04-01 11:00:26,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-04-01 11:00:26,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 11:00:26,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:26,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:26,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-04-01 11:00:27,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 11:00:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,017 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-04-01 11:00:27,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2023-04-01 11:00:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,041 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2023-04-01 11:00:27,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 49 [2023-04-01 11:00:27,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-04-01 11:00:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,214 INFO L321 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2023-04-01 11:00:27,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 86 [2023-04-01 11:00:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,236 INFO L321 Elim1Store]: treesize reduction 38, result has 46.5 percent of original size [2023-04-01 11:00:27,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 79 [2023-04-01 11:00:27,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 11:00:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:27,271 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2023-04-01 11:00:27,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2023-04-01 11:00:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:27,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:27,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:27,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 133 [2023-04-01 11:00:27,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:27,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 112 [2023-04-01 11:00:27,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:27,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 233 treesize of output 219 [2023-04-01 11:00:27,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:28,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 198 [2023-04-01 11:00:28,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:28,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 363 treesize of output 349 [2023-04-01 11:00:28,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:28,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 328 [2023-04-01 11:00:28,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:28,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 177 [2023-04-01 11:00:28,951 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:28,951 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:28,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:29,016 INFO L321 Elim1Store]: treesize reduction 765, result has 3.2 percent of original size [2023-04-01 11:00:29,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 79742 treesize of output 72948 [2023-04-01 11:00:29,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:29,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2863 treesize of output 1865 [2023-04-01 11:00:29,234 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,235 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,235 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,237 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 148 treesize of output 142 [2023-04-01 11:00:29,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 160 [2023-04-01 11:00:29,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 134 [2023-04-01 11:00:29,248 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,250 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,250 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,256 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-04-01 11:00:29,256 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 34 treesize of output 26 [2023-04-01 11:00:29,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:29,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 189 [2023-04-01 11:00:29,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,269 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,275 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2023-04-01 11:00:29,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 5590 treesize of output 5436 [2023-04-01 11:00:29,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:29,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1264 treesize of output 818 [2023-04-01 11:00:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,311 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 11:00:29,313 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 676 treesize of output 646 [2023-04-01 11:00:29,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 686 treesize of output 568 [2023-04-01 11:00:29,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 557 treesize of output 481 [2023-04-01 11:00:29,375 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-04-01 11:00:29,375 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 45 treesize of output 37 [2023-04-01 11:00:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:29,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817465580] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:29,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417864764] [2023-04-01 11:00:29,401 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 11:00:29,402 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:29,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:29,402 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:29,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:29,421 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs